The Meandering Channels of Mars

Space & Earth / Space Exploration

Dec 10, 2009 | 4 / 5 (5) | 5

Sinuous channels on the Martian surface may be evidence of relatively recent rainfall. Researchers plan to test this hypothesis by studying sinuous streams on Earth.

Rare Scottish mineral may indicate life on Mars

Space & Earth / Space Exploration

Dec 10, 2009 | 3.6 / 5 (21) | 6

(PhysOrg.com) -- A team of NASA (National Aeronautics and Space Administration) scientists is looking for clues about life on Mars in an earthy clay mineral found only in Aberdeenshire in Scotland.

DNA study sheds new light on horse evolution

Biology / Evolution

Dec 10, 2009 | 5 / 5 (2) | 39

(PhysOrg.com) -- Ancient DNA retrieved from extinct horse species from around the world has challenged one of the textbook examples of evolution - the fossil record of the horse family Equidae over the past ...