As early as their 20s, people can experience a decline in the efficiency of their sleep receptors.
Make sure to have the proper eyewear for the August 21st solar eclipse.
Chimpanzees may care for the bodies of their deceased relatives.
Trying to figure out how to experience the 2017 solar eclipse? We've got options for you.
Total solar eclipses are when the sun's corona are most easily observed.
From thieving firedogs to mathematical calculations, peoples' understanding of solar eclipses has evolved.