Kanina Foss writing at the University of the Witwatersrand: The question of why an individual would actively kill itself has been an evolutionary mystery. Death could hardly provide a fitness advantage to…

Creepy and cool. Annalee Newitz writes on io9.com:

From a crack in the Taylor Glacier in Antarctica flows an iron-rich water the color of blood. Scientists believe it comes from a lake frozen beneath the glacier 2 million years ago. And it’s packed with microbes.

First discovered in 1911, the so-called Blood Falls also contain extremophile microbes from the trapped lake, which have evolved for millions of years without light or any outside food source. They have survived by learning to eat sulfur and iron.

Blood Falls