March for Science draws big crowds, clever signs across U.S.

By Lacey Johnson and Lisa FernandezWASHINGTON/SAN FRANCISCO (Reuters) - Tens of thousands of people turned out in cities across the United States and beyond on Saturday for Earth Day events billed as a "celebration of science" to counter what organizers say is a growing disregard for evidence-based knowledge in Washington.Demonstrators carried signs like "There Is No Planet B," "No One Is Above Peer Review," "Revenge of the Nerds" and "Make Science Great Again," a play on U.S. President Donald T