Well, that’s a wrap. With the inevitability of Earth’s annual progression around the writhing sphere of fire and fusion that sustains our life, another semester comes to a close and another class comes to an end.
However, just as all things must end, all things must begin. Days, summers, worlds, perspectives, you name it. So as I look back on a semester filled with physical and intellectual and new horizons (see what I did there), I can recognize the humble beginnings of a new personal belief:
![Male narwhals caress one another with their tusks in Nunavut, Canada.](https://wwf.ca/wp-content/uploads/2020/02/Narwhal-Male-narwhals-caress-one-another-with-their-tusks-in-Nunavut-Canada.-%C2%A9-Paul-Nicklen-_-National-Geographic-Creative-_-WWF-Canada-scaled-e1590683523336.jpg)
Aliens definitely exist.
For the longest time, I didn’t believe in aliens. Maybe it was to avoid some weird fear of getting randomly abducted before taking an exam and being thrown around our solar system and forced to identify what world they put me on. Maybe it was because MARVEL made it seem too cool to be true. Or maybe it was because I saw a picture of a narwhal and thought, “yeah, there’s no way that thing exists anywhere else.”
![APOD: 2008 January 4 - The Milky Way at 5000 Meters](https://apod.nasa.gov/apod/image/0801/16500feetmilkywaykc2_brunier.jpg)
Regardless, though, my thoughts have changed, largely in thanks to our work on extremophiles and the Drake Equation. For example, after using the Drake Equation, I calculated that there are probably over 4,000 civilizations in our galaxy alone. More importantly, though, last year two scientists at the University of Nottingham, who presumably have a much better idea of what they are doing than I do, used the Drake Equation and calculated that there are about 36 alien civilizations in our galaxy capable of communicating with us. Then, extrapolating the data by taking our Milky Way as one of 125 billion galaxies in the observable universe, I like the odds.
So, aliens, if you ever read this, I wrote you a little letter. I hope you like it.
Dear Aliens,
How’s it going? I hope you know I believe in you, and I hope if you’re out there that you believe in me, too.
Cheers,
peter