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The sister theory—the Moon formed together with (but independent of) Earth, as we believe many moons of the outer planets formed. The capture theory—the

In space, the brain also undergoes functional and structural changes related to fluid shift. Also, based on available evidence, galactic cosmic radiation

The last full moon of 2021 reached peak illumination on Saturday, Dec. 18, at 11:32 p.m. ET, according to NASA. Known as the "cold moon"

The major health hazards of spaceflight include higher levels of damaging radiation, altered gravity fields, long periods of isolation and confinement

Taking what can be detected directly by spacecraft, scientists estimate that the measurable total of Martian water — in other words, its hydrosphere —

NASA's Hubble Space Telescope has made the deepest image of the universe ever taken in near-infrared light. The faintest and reddest objects in the

Expansionists such as Roosevelt, former President Harrison, and Captain Mahan argued for creating an American empire. However, others, including Grover

Unprocessed potatoes are paleo Generally, unprocessed potatoes of all types can be part of a paleo diet. Similarly to grains, which are off-limits on paleo

Inherited (or hereditary) variants are passed from parent to child and are present throughout a person's life in virtually every cell in the body.

Orangutans are much taller than chimps, and they are almost as twice as heavy. So, in a potential brawl between the two, orangutans would come out as winners