Scientists have found fossil evidence from tropical corals that existed at that time, and they have about 400 daily growth rings per year.
Anyone who spends an extended period of time in space faces serious medical problems due to the near total absence of gravity.
After solving the problem of dining in space, astronauts need to think about the next natural step!
Many plants roots grow deep down into the soil, but how does the plant know which way is down?
Did you know it seems we're discovering a new exoplanet every week?
Your body uses three senses to keep you balanced--to tell you what's up and down.
New calculations suggest the rending of neutron star crusts may afford astrophysicists a glimpse at the insides of these bizarre celestial bodies.
Why is the earth round? Why isn't it a cube or a pyramid?
Here's an odd thing about weightlessness: if it were possible to live in the center of the earth we would be weightless there, too!