Although there may be some earlier evidence of ritual practices by modern humans, such as the 40,000-year-old "lion man" ...

This 2012 satellite photo shows a series of giant windblown ridges, known as yardangs, and a group of towering sand dunes at ...

Lamb and colleagues at University of California, Berkeley in Berkeley, Calif., was titled "Formation of Box Canyon, Idaho, by Megaflood: Implications for Seepage Erosion on Earth and Mars." ...

of rock strata were carved away by ancient glaciers during the planet's Cryogenian ("Snowball Earth") period about 700 to 635 million years ago. "The fact that so many places are missing the ...