Is This Why We Haven’t Found Alien Civilizations? | STELLAR

Physics Girl explores how We’ll Find the Aliens in Our Solar System!

Looking up at the stars makes you wonder: what and who is out there? And why haven’t we seen any other intelligent civilizations given the vast size and age of the universe? They’re complicated questions and although we haven’t met any other space-faring species we do have a way of calculating just how many alien civilizations might be out there as well as some rather frightening ideas as to why we might not have met them.

This video is a bit different from most It's Okay To Be Smart videos. It's part of a new PBS miniseries called STELLAR, done in collaboration with Matt O’Dowd from PBS Space Time and Dianna Cowern from Physics Girl. Over six episodes we travel to telescopes, go inside space research centers, and chat with amazing scientists to bring you the most exciting stories about space.

**I figure out how we took a picture of a Black Hole with a telescope the size of Earth

**Physics Girl visits LIGO to learn about gravitational waves:

You'll be able to see future episodes on the Physics Girl, Space Time and It’s Okay to be Smart YouTube channels, as well as the PBS Digital Studios Facebook page.

#SummerOfSpacePBS #astrophysics #space

Hosted by Joe Hanson
Written by: Joe Hanson, Andrew Kornhaber, Eric Brown
Directed by: Eric Brown and Andrew Kornhaber
Producer: Randa Eid
Director of Photography: Eric Brouse
Sound: Tobi Nova
Production Assistant: Anna Bosketti
Editing: Pavel Ezrohi
Graphics: Murilo Lopes
Assistant Editing: Daniel Sircar
Produced By: Kornhaber Brown

[Real]

The assumption is that life outside Earth needs water. Or has even remotely similar attributes to us. Maybe we are unique but maybe other life forms exist but were not even looking in the right place for them.

[ZoggFromBetelgeuse]

If I were you Earthlings, I wouldn't look so hard to contact extraterrestrial life, I'd rather try to stay under the radar. Believe me, you're better off without the Central Galactic Bureaucracy.
The reason is simple: You have such a huge moon, compared to your planet's size, that the moon tax alone would ruin you. Also, with your oceans full of weapons-grade hydric acid, your multitude of political systems and your dangerous mathematics that makes you independent from planetary superbrains, many players in the galaxy would consider you a threat to public order.
Besides, do you really want to do the paperwork for 3.7 billion years of unsupervised evolution?

[anunayasingh]

Simple living organisms might be very common but intelligent life must be very rare

[Asteroid_Jam]

One problem is we are assuming that all life forms would use the same bio chemistry like use. They be using a chemistry we can not even imagine because how little we know about universe.

[ax]

Maybe when aliens are bored of intelligence and start looking for stupid life they may find us first.

[JustinY.]

What are you talking about? Of course we found them, they're just being interrogated in area 51.

[iamsmoke]

I'm not sure but maybe if they zoom in on Earth, they probably see dinosaurs because it takes so long for light to travel that far away

[Brainstorm]

You better believe that I will click on ANY video that discusses the Fermi Paradox. 10/10

[seska]

I love this episode because usually when people talk about aliens, it’s weirdos, but I love hearing about it in a rational, statistical stance

[DigitalMonsters]

0:00 Common sense guess is just; universe is freaking huge; we are young.

We've only been broadcasting ourselves for a very short while (in distance radio waves have had time to travel).

I think it was Carl Sagan in Cosmos or Neil de Grasse Tyson in Astrophysics for people in a hurry who said: 'Claiming there's no life in the universe is equivalent to taking a thimble; dipping it into the ocean and upon observing the contents, proclaiming "whales don't exist" '

[MileMarker]

The great filter is time and distance.
Plain and simple.
I'm sure there out there but there not right around the block.

[Maeve-The-Brave]

Wow! I took Astronomy 101 with John O’Meara at Saint Michaels College in my junior year! He is truly a fantastic professor, and this is coming from someone who has struggled greatly with the traditional American school system for my entire student career. I have to give him serious credit for jump-starting my now-huge interest in space and astronomy. Since taking his class, I’ve always been proud to tell anyone who will listen that one my professors works with the Keck telescopes! He presented probably the best lecture I’ve ever been to in my life on the last day of class about aliens and the Drake Equation. I remember the entire classroom standing up and applauding afterwards. Thank you for more than you know, professor O’Meara.

[anthonykham]

Telescopes shooting lasers and aliens be thinking they're being attacked.

[bilalsadain]

Even if we only find single celled organisms on another planet, it will change everything we know about life

[ojaschandgadkar]

Universe is very huge.
There must be surely someone out there! 😉

[defiant_waffle_]

Man, I love giving myself an existential crisis! Love these videos.

[ap]

'Sometimes I think the surest sign that intelligent life exists elsewhere in the Universe is that none of it has tried to contact us.'
- Calvin




I agree

[mwmnmwm]

When we do hear a voice from the darkness, , it will have spoken millions of years ago. We will still be glad to hear it.

[kbbeats]

Beautifully done. I'm humbled by our universe. The immensity of spacetime. It's awe Inspiring.

[MisterItchy]

They already know the answer .. it's 42. Now, they just need to find the question before the Vogon Constructor Fleet arrives.