Theoretically, it’s impossible for us to perceive a 4D creature. That is, unless it broke into our three-dimensional reality.
Live Science on MSN
Asteroid impacts could catapult extraterrestrial life into space, experiment hints
"Extremophile" bacteria could survive asteroid impacts that are strong enough to launch them into space, suggesting that life could travel between planetary bodies.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results