Monarch butterflies of eastern and central North America migrate each fall, over great distances, to the same winter homes of their great-great grandparents.
Two galaxies in the Virgo cluster 60 million light-years away are being stripped of gas by a process akin to the wind you feel in your face when bicycling.
"To understand any process," said Robin Bell , "you have to understand it from start to end. And what we want to be able to do with ice sheets is actually model how they grow and how they collapse."