Rains Attract


Around 200 million years ago, all land on Earth was part of Pangaea (a supercontinent existing during the Paleozoic and Mesozoic eras). There was enough space for the animals to roam, yet they congregated to regions.

While mammals lived in areas where there were rains twice a year; reptiles stayed in areas where rains came just once, a study of fossils showed. Researchers say this was so because mammals excrete more water. The findings are important because climate change and resulting decrease in rains is likely to affect mammal populations.


Down To Earth, June 2011