Russia was expected to dominate the skies over Ukraine. But Ukrainians are still shooting down helicopters and planes, making Russian pilots very wary about venturing into Ukrainian airspace.
In his book The Women's House of Detention, Hugh Ryan writes about the New York City prison and the role it played in the gay rights movement of the '60s, including the 1969 Stonewall Uprising.
With a decreasing population of lake sturgeon, nine states have listed the species as endangered. To protect them, scientists are studying where lake sturgeon travel before and after they reproduce.
A team at Stanford University has reversed memory loss in old mice by flooding their brains with spinal fluid taken from young animals. The finding may hold promise for Alzheimer's research.