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By Malcolm Ritter The Associated Press

Brain implant lets paralyzed man regain use of hand

NEW YORK — A paralyzed 24-year-old man has regained some use of his right hand, controlling it with signals relayed from electronic sensors in his brain.

Ian Burkhart of Dublin, Ohio, can grasp a bottle, pour its contents into a jar, pick up a stick and stir the liquid. He can grab a credit card and swipe it through a reader. He can move individual fingers and hold a toothbrush.

Neanderthal DNA may influence modern depression risk

NEW YORK A new study says a person’s risk of becoming depressed or hooked on smoking may be influenced by DNA inherited from Neanderthals.

Researchers found evidence that one bit of Neanderthal DNA can boost the risk of tobacco addiction, while others can slightly raise or lower the risk of being diagnosed with depression.

Bones of hunted mammoth show early human presence in Arctic

NEW YORK The remains of a mammoth that was hunted down about 45,000 years ago have revealed the earliest known evidence of humans in the Arctic.

Marks on the bones, found in far northern Russia, indicate the creature was stabbed and butchered. The tip of a tusk was damaged in a way that suggests human activity, perhaps to make ivory tools.