Why was Supersaurus so big? This impressive, 100-foot-plus sauropod was one of the largest creatures to ever walk the Earth – far larger than any terrestrial animal alive today. What could account for ...

Swollen ankles, an aching back, acid reflux … pregnancy can be the pits. But humans aren't the only species who have to put up with some inconveniences in order to reproduce. Here's a tour through the ...