A train traveling from west to east is lighter than traveling from east to west thanks to the Eötvös effect.
In early 1990s, NASA sent jellyfish to space to test how spaceflight would affect their development. The jellies did not develop the proper gravity-sensing capabilities and had trouble figuring how to swim around in normal gravity, with abnormal pulsing and movement when returned to Earth.
The microgravity of space can cause astronauts’ blood to run backwards.
You weigh less if you visit certain areas of Canada, namely the Hudson Bay Area and parts of Quebec, because there’s less gravity there than other parts of the world.
Astronauts lose as much as 22% of their blood while in space, as a reaction to the uniform blood pressure caused by microgravity. Until their body replaces this blood, many returning astronauts can’t stand for more than a few minutes without fainting.
Low gravity makes it difficult to tell if your bladder is full, because the bladder’s stretch receptor nerves don’t feel the weight of the liquid. Astronauts are trained to empty their bladders every two hours because of this.
If you jumped off a 5ft ledge on neutron star by the time you hit the ground you would be doing 4 million miles an hour.
NASA cannot bring birds into space because birds need gravity to swallow.
NASA will pay you $15,000 to lay in bed for 90 days, measuring the effects of zero gravity on your body.