This Week: Ancient water = ancient habitat?
In the News: Tornado prediction
Coming Thursday: Roaches: A lot smarter than you thought!
Geologic dating shows that water has been trapped more than 2 kilometers underground since before the Cambrian explosion. This water contains chemicals that support bacteria in other places. Could the deep biosphere contain relics of the most primitive life? Could such life exist on Mars? More »
Smelters refine aluminum ore, but not iron ore, with electricity. A new electrolytic process for refining iron ore could save vast amounts of greenhouse gases. More »
Darwin thought life had to predate the Cambrian era, and yet there was no evidence. In 1953, a Wisconsin geologist saw fossils aged almost 2 billion years. Now, life has been discovered in rocks from 3.5 billion years. What was life like, and how do we recognize it? More »
Was the epic 2011 heat wave in Texas due to global warming or natural variation? More »
Tornadoes need wet air, dry air, and wind shear. What explains the big improvement in tornado prediction? Is climate change boosting these storms? More »
What are sinkholes, and how dangerous are they? Can we detect and prevent them? Should you be asking more questions about the ground we're standing on? More »
British archeologists unearthed bones of Richard III, who died in 1485 after a murderous reign. How do bones, isotopes, historic records, DNA and grave goods tell us about the dead? More »
Three gross "biotherapies": Leeches suck blood after surgery. Maggots clear dead tissue from wounds. Parasitic worms fight ulcerative colitis. More »