Don’t Count Them Out

Tardigrade, facts and photos
Image of a water bear

When we discussed the possibility of life on other planets, the main crux of the idea were the abilities of extremophiles to survive in unimaginable conditions. These guys take the idea of making the best of a bad situation to the next level, comfortably surviving in subzero temperatures or toxic radiation. Thinking about these improbable creatures got me thinking, how exactly do they manage to do it? I mean how could they pull off living in the most extreme environments on Earth?

I thought I would use the tardigrade, also known as the water bear, as my example. This is a tough little guy, as it is known for surviving in temperatures from -328 °F (200 °C) up to 304 °F (151 °C), can easily thrive without water or oxygen, and feels at home at radiation levels thousands of times what humans can handle. However, there are limits to what it can survive under. When the going gets tough, water bears go into a state of cryptobiosis, where all bodily processes stop and it will just sit and wait for conditions to improve. Amazingly, it can pull this off for several decades!! If water bears can survive in these hostile conditions, then I can’t see why it wouldn’t be possible for some creature to pull this off on another planet.

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Religious Pushback to Science: The Scopes Trial

When you first studied biology, you likely saw a picture like this:

Image courtesy of iStock

Though discussing evolution seems commonplace today, it wasn’t always accepted.  Notably, the debate over teaching it in schools bubbled up in our backyard just under one hundred years ago: the 1925 Dayton, Tennessee, Scopes Trial.  In this post, I’ll tell you about the background of the trial and the trial itself.

THE BUTLER ACT

Though Darwinism is now widely accepted, even into the twentieth century, many people didn’t believe it (source).  One such person was John W. Butler, the representative of “Macon, Trousdale, and Sumner Counties in the Tennessee House and Senate” who opposed teaching Darwinism in public schools (source).  In March 1925, the Tennessee legislature passed the Butler Act – named after John Butler – “which declared unlawful the teaching of any doctrine denying the divine creation of man as taught by the Bible” (source).  Teaching Darwinism had been deemed illegal.

ENTER JOHN SCOPES

On May 4, 1925, “[a] Chattanooga newspaper [ran] an item noting that the American Civil Liberties Union [was] seeking teachers willing to challenge the Butler law.  The item [said] that the ACLU [was] ‘looking for a Tennessee teacher who is willing to accept our services in testing this law in the courts.  Our lawyers think a friendly test case can be arranged without costing a teacher his or her job…  All we need now is a willing client,’” and on May 5, “[a] group of town leaders in Dayton, Tenn., read the news item about the ACLU’s search.  They quickly hatch[ed] a plan to bring the case to Dayton, a scheme that they hope [would] generate publicity and jump-start the town’s economy.  They ask[ed] 24-year-old science teacher and football coach John Thomas Scopes if he’d be willing to be indicted to bring the case to trial.  Scopes agree[d], even though he ha[d] only taught biology as a substitute teacher and later [said] he [wasn’t] sure he covered evolution in his classes,” (source).

RECAP

So, evolution was barred from being taught in schools… and Scopes had agreed to be charged for teaching it.

THE LAWYERS

Now that Scopes was being taken to court, it was time to call in the lawyers.  Scopes’ “lawyer was the legendary Clarence Darrow, who, besides being a renowned defense attorney for labor and radical figures, was an avowed agnostic in religious matters.  The state’s attorney was William Jennings Bryan, a Christian, pacifist, and former candidate for the U.S. presidency. He agreed to take the case because he believed that evolution theory led to dangerous social movements. And he believed the Bible should be interpreted literally,” (source).

THE TRIAL

“‘Millions of guesses strung together,’ is how Bryan characterized evolutionary theory, adding that the theory made man ‘indistinguishable among the mammals.’  Darrow, in his attacks, tried to poke holes in the Genesis story according to modern thinking, calling them ‘fool ideas that no intelligent Christian on earth believes,’” (source).  To keep the trial focused, Judge John Raulston limited proceedings to investigate the sole question of whether Scopes had taught evolution – not whether evolution was scientifically accurate – so because Scopes had, in fact, taught Darwinism, he was fined one hundred dollars, and the trial ended (source).  Later, “[o]n appeal, the state Supreme Court upheld the constitutionality of the 1925 law but acquitted Scopes on the technicality that he had been fined excessively.”

THE OUTCOME

Ultimately, “Bryan and the anti-evolutionists claimed victory … [b]ut Clarence Darrow and the ACLU had succeeded in publicizing scientific evidence for evolution,” (source).  In 1967, the Butler Act was repealed.  Evolution was finally welcome in the classroom.

LINGERING QUESTION: SOMETHING FOR US TO PONDER

The Scopes Trial poses an important question: to what extent should we allow religion to bleed into other spheres of life?  Should we allow religion to provide significant pushback on science, as it did when evolution was banned from the classroom?  Should we allow religion to guide our school curricula?  What about our laws?  Let me know in the comments below!

Image courtesy of Me.Me

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A New Discovery in the World of Extremophiles

Location these extremophiles were found (SOURCE)

Geologists have recently discovered an entire new species of extremophiles among us on planet earth, and the location may shock you. More than 500 km away from nutrients and sunlight, these extremophiles have made a home beneath the Antarctic ice shelf (SOURCE). While this discovery was not meant to actually happen, scientists are pleasantly surprised to have discovered yet another incredible species among us on planet earth. Scientists were trying to discover a new sediment from beneath an ice shelf when they hit a boulder that had such life forms clinging to it, described as very similar to sponges. What is most shocking about these creatures is that not only are they able to survive in such an environment but they are able to do so while being completely stationary! Yes that is right, these extremophiles do not even move to search for the food, which is even more shocking because animals that do survive at such depths were previously thought of as needing to have a capability to swim and discover food for themselves. These animals really do put the extreme in extremophile! Are you surprised by this new discovery? Comment down below your thoughts! 

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Gotta be Life out there

Today we will be talking about extremophiles. After learning about all of the potential life that can survive in the harshest of environments, it made me think that there must be life out there. What may seem like a super hot, extremely pressurized environment to us on Venus, may seem like the ideal conditions for heat/pressure loving organisms. Just because us humans wouldn’t be able to survive the heat of Venus or the freezing of Pluto, doesn’t mean that others can’t as well. Just in our solar system there are a handful of worlds that could potentially hold life; ours may be the only one able to support us, but extremophiles could live on a handful of them. So now, think about all the other stars systems and how their worlds may also have the possibility to harbor life. Maybe it isn’t life that we could live under, but surely some extremophiles could. Below is a photo showing extreme conditions that we know life can live in.

By Frontiers

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Hey, Where is Everybody?

When we studied the Drake Equation in class, it was interesting to note that using the maximum possible values for each variable in the equation, there could be as many as 21,000,000 detectable civilizations out there right now waiting to be discovered? If there are so, so many civilizations out there sending communication into space and maybe even traveling through space themselves, where is everybody? This is the basis for the Fermi Paradox.

Given just how massive our galactic neighborhood is, the radio silence from the reaches of the Milky Way is certainly paradoxical. It is a little unsettling just how alone humanity seems to be right now. However, there are many theories as to why this is the case.

For example, maybe colonization simply isn’t the norm for other civilizations in the galaxy. Maybe humans are just power-hungry, land-grabbing outliers in a universe of civilizations that are each content with their own little slice of galaxy. Phrased another way, maybe it is not human ambition, but rather human curiosity that is the outlier.

Then again, maybe discovering extraterrestrial life is just a massively difficult task. At the beginning of the semester, I made a blog post detailing just how painfully slow the speed of light is when compared to the massive scale of even just a single solar system. Even if we had another space-faring civilization as our “next-door” neighbors in the Proxima Centauri system, they would still be five light-years away! At the fastest speed achieved by humans so far (40,000 km/h during the Apollo 11 mission’s return to Earth), it would take over 100,000 years to reach Proxima Centauri (or for someone from Proxima Centauri to reach us). It’s easy to lose sight of just how difficult it might be for life to travel or even just communicate across the stars.

That being said, I don’t want anyone to lost hope. Barring humanity running ourselves into the ground, we have a long time to find an explanation of the Fermi Paradox. It’s still likely that we’re not the only form of life in the universe.

The Fermi Paradox | BLUEsat UNSW
This great infographic outlines some possible explanations for the Fermi paradox.
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Life In The Extremes

If there’s anything I’ve learned in my studies of biology over my education, it’s that life is precarious, delicate, and precious. However, now that I’ve learned more about astrobiology through this course, I’ve also come to know that life is hardy and determined. As Ian Malcom so astutely notes in Jurassic Park, “Life finds a way.” Nowhere is this more true than in the many examples of extremophile life on our world.

Find A Way GIFs - Get the best GIF on GIPHY
You can find this GIF here.

From boiling lakes to nuclear reactors, the places extremophiles call home are often thought to be entirely inhospitable to life. Knowing this, and considering just how inhospitable the other worlds of our solar system seem to be, could it be possible for life to exist throughout our solar system in this form?

For example, psychrophiles (also called cryophiles) are capable of surviving and thriving in temperatures as low as -20 degrees Celsius. Given their proclivity for cold, it may be possible that microscopic psychrophiles are hiding in the red sands of Mars or even deep in the subsurface oceans of Europa. It’s amazing to think that even as life seems so rare and so fragile, it is also capable of appearing places it seems like it couldn’t possibly survive! Perhaps extremophiles like psychrophiles are the key to identifying extraterrestrial life.

This is an image of some psychrophiles found on Earth.
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Keeping Up With The Kardashev Scale

Yes, this is the Citadel from Mass Effect

Feel free to take a few seconds out of your day to fully appreciate the genius title I came up with for this post. I’ll even give you some scrolling to do while you appreciate it!

The Kardashev scale was designed in 1964 by Nikolai Kardashev to measure a civilization’s level of technological capability based on the amount of energy it is able to harness. Kardashev began with Type I, II, and III civilizations, and the scale has expanded since then to include Type IV and V civilizations. Funnily enough (more like sadly, I suppose), we’re not even on the scale yet!

Type I civilizations have the power to fully utilize the energy of their own planet. You might think we already do (spoiler alert: we don’t), but this would actually require us to gain control of volcanoes, weathers, earthquakes, and all that good stuff. Current assessments actually put us at a 0.72 on the scale, but considering the scale is logarithmic, we have a good ways to go before we reach Type I. To be specific, it’s estimated to be around 100-200 years. Type II civilizations are able to fully harness the power of their neighboring star, and to reach this designation, we would need to increase our energy production by over 100,000 times. Sounds pretty easy to me! For these types of civilizations, think some of the advanced species from the video game Mass Effect, Star Wars’ Starkiller Base (a [Hosnian] PRIME example, in my opinion), and maybe even Star Trek’s Federation of Planets. Type III civilizations can control the energy of their galaxy, and are best characterized as the Asgardians in the MCU (the Bifrost, a type of wormhole, requires an IMMENSE amount of energy to sustain based on some complicated mathy things I really don’t want to get into, placing them around 3.2) and the Masters of the Mystic Arts from Doctor Strange. As for Type IV and Type V civilizations (which Kardashev personally believed were too advanced), they are able to utilize the energies of the entire universe and multiple universes, respectively. These would require civilizations to tap into energy sources and laws of physics that are currently unknown to us, and some even theorize that these civilizations could live inside of black holes. One such example of a potential Type IV civilization are the Gallifreyans from Doctor Who. These civilizations harness an unimaginable amount of power, and although I consider myself an optimist, these civilizations are beyond even the limits of my own imagination.

In short, here is the Kardashev scale breakdown:

  • Type I – Planetary Civilization
  • Type II – Stellar Civilization
  • Type III – Galactic Civilization
  • Type IV – Universal Civilization
  • Type V – Multi-Universal Civilization

This has probably been my favorite blog post thus far, so I hope you all enjoyed! I’m curious to hear your thoughts- this scale may be interesting to theorize about, but do you think it’s actually an arbitrary one? Do you think humanity would even last long enough to advance up the scale, maybe even to a Type V civilization? Is there even a limit to this scale, or could we continually keep extending it as we learn more about our universe and energy sources?

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I Want To Believe!

Photo Credit: Milwaukee Magazine

Forget Fermi’s paradox. Forget the Drake equation. Yet another hot-button topic relating to astronomy and (potential?) extraterrestrial life is- you guessed it- unidentified flying objects (UFOs for short). Do I think it’s kind of a stretch that I’m relating this to chapter 24? Absolutely! But with the (relatively) recent declassification by the Pentagon of three U.S. Navy videos showing “unexplained aerial phenomena,” I think it’s about time I share with you all my top 5 UFO sightings. Let’s go!

“Britain’s Roswell”

The United Kingdom’s most famous UFO sightings occurred near Rendlesham Forest in 1980. Two U.S. Air Force personnel reported strange lights falling to Earth at around 3 A.M. They then proceeded to enter the forest and saw a metallic object floating around and emitting light. Local police arrived and discovered markings at the site, and a few days later, more servicemen reported three bright lights in the sky that lasted for hours. The Air Force lieutenant and the witnesses still maintain what they saw.

Chicago O’Hare Airport Encounter

United Airlines staff and pilots at the O’Hare Airport in 2006 noticed a dark grey saucer hovering above gate C17. The UFO reportedly hovered for around five minutes until it shot upwards into the overcast sky, breaking a hole in the clouds (enough so that people could then see the blue sky). A total of 12 United employees, as well as other witnesses, corroborated this claim. The Federal Aviation Administration did not investigate the incident, citing “weather phenomenon” and the fact that the UFO had not been picked up by the radar.

Aguadilla Airport Incident

In 2013, a UFO was reported flying at low altitude across the runway at the Rafael Hernandez Airport in Puerto Rico. The vessel did not give off any warning signals, and it ended up delaying a flight’s departure. In some instances in the footage, it travelled below tree-top altitude at speeds close to 100 mph. The video footage can be found here.

Tic-Tac UFO Sighting

In 2004, a U.S. Navy pilot commander and flight crew reported something “not from this Earth” when they saw a vessel shaped like a tic-tac moving at incredible speeds (3x the speed of sound and more than double the speed of their fighter jets). The crew was able to track the object and film it, and I’ve added a picture of the footage below. The link to the video can be found here.

Navy pilot recalls encounter with UFO: 'I think it was not from this world'  - ABC News
Image Credit: ABC News
GO FASTER Video

Definitely my favorite UFO sighting (and footage) thus far! This video was publicized as part of the Pentagon’s declassification, in which it shows the tracking by a U.S. Navy F/A-18 Super Hornet of an unidentified aircraft flying at low altitude. Some attribute this sighting to parallax, as a fast-moving jet would create the illusion of a relatively slow object (like a bird or balloon) moving fast. I DEFINITELY recommend watching the video, where you can hear the excitement and exclamations of the pilots.

Do I believe that some of these incidents could be easily explained by non-extraterrestrial phenomena? Well, yes, of course. But is that any fun? No! So what do you all think? Do you think aliens have visited our humble abode, and if so, what are your favorite alien encounter stories? And if you don’t think aliens have visited, feel free to share why!

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The Star That Vanished

From 2001-2011, astronomers studied a luminous blue variable star about 75 million light years away in the Aquarius constellation. It was a massive star, about 2.5 million times brighter than our Sun, and it was approaching the end of its life.

An artist's impression of the the luminous blue variable star that mysteriously vanished.

Flash forward to 2019, and an astronomer named Andrew Allan, began a study of distant LBV stars, as they normally create massive supernova explosions and color a massive vicinity around them with ionized gasses and radiation.

But Allan looked towards the previous location of this star in Aquarius, and it has vanished entirely. Supernova explosions typically leave a residual neutron star or black hole, but in this case, there was nothing to signal that a star even existed… much less a massive LBV.

Astronomers have given two answers to this perplexing situation. One is that the star collapsed into a black hole without a supernova explosion, which would be the first documented case of this occurrence. The other is that dust and space debris is covering up, and it has lost significant luminosity.

Either way… weird.

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Reflection on Astronomy 2110

The biggest thing I will take away from all that I have learned in Astronomy this year is just how small and irrelevant humans are both in comparison to the size and timeline of the universe. I had always heard that the universe was infinitely big but never thought anything of it and didn’t consider the existence of anything outside of our own tiny solar system. I assumed that since the only planets I had learned about were in our solar system, those were the only planets that existed. In reality, our solar system is just a very small part of The Milky Way Galaxy, which is just a very small part of our universe. Whether or not humans destroy their ability to live on Earth, the universe will be affected very little or not at all by the change. Maybe if more people learned, in a scientific context, that the Earth is not the center of the universe, they will be more careful of the affect they have one the Earth as well as appreciating their very brief existence on earth and in the universe.

Earth in comparison to the universe!
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