Can humans live on the side of a tidally-locked planet where neither day nor night exist?
Humans with their technology developed on Earth could live on a tidally locked planet where neither day nor night exists. We used to think that such planets become…
How did NASA make the shuttle safer after Columbia?
The problem was not just the piece of foam that struck the wing, it was a failure of imagination — NASA had seen foam fall before and decided…
Why do US Air Force fighters like the F-22 and F-15 place the engines right next to each other while Russian fighters like Su-27 always have a gap between the engines?
The United States has this thing where we learn from our mistakes. One of those mistakes was spacing twin engines as far apart as we did in the…
Is Mars too small to have a permanent atmosphere?
No, it is not. It used to have a thick atmosphere, perhaps thicker than Earth’s. It had that atmosphere for a couple of billion years and had oceans….
Buzz Aldrin has been denying the moon landing as of recent. Did we really go to the moon?
I have a friend who subscribes to the idea of a moon landing hoax. He refutes any evidence simply by expanding the scope of the hoax to include…
If all humans died today, how long will it take for all evidence of humankind’s existence to be erased from Earth, including the orbits of artificial satellites and space junk?
Obvious to casual inspection? A few thousand years for most technological objects, except for space junk in high orbits. Possibly a few hundred thousand years, for engineering works…
Was John F. Kennedy’s original casket buried at sea by being dropped from a plane?
YES. This is true. The bronze casket obtained by the Secret Service shortly after Kennedy was pronounced dead in Parkland Hospital was used to transport his body back…
How far up the Mississippi River could an attack submarine travel underwater?
Every full size submarine ( diesel /AIP/ or nuclear) has had the same overall approximate height from the top of the periscope to the keel since WWII…. They…
Why do donkeys kill coyotes, but horses run, i.e., why are donkeys not scared like horses?
We donkey owners have all witnessed our donkeys facing down and chasing feral dogs, coyotes, and sometimes snakes. It sure beats being thrown from a horse that is…
What did the Germans think of the B-17?
Finding one that had crashed, the Germans first obtained a close-up view of a B-17 bomber in October 1942. They studied it at their Rechlin test center. This…