EarthSuper-salty Turkish lakes may hold key to spotting life on Mars A new survey of extreme microbes living in salty and alkaline lakes could yield "fingerprints" that help detect the biological origin of rocks on Mars News
LifeMysterious deep-sea sharks biting chunks out of migrating whales Cookie-cutter sharks rise from the depths to feed on whales – and the wounds they leave are shedding light on both the sharks and their prey News