WASHINGTON — A federal district judge said Tuesday that paint tests on a 19th-century historic landmark building next to the White House can go ahead, advancing President Donald Trump’s plans to add a new coat of white paint to the Eisenhower Executive Office Building, for now. Trump has suggested the massive building be painted as
Researchers are trying to produce human sperm (shown here in a colored electron microscope image) from stem cells in the laboratory.Credit: Juergen Berger/Scientific Photo Library It sounds like science fiction: collecting blood cells from a person, engineering them to eventually develop into immature sperm, and then incubating them in a small sac grown in a