MILWAUKEE -- A growing number of pastors in the United Methodist Church say they're no longer willing to obey a church rule that prohibits them from officiating at same-sex marriages, despite the ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Until now, cells dividing by mitosis were thought to grow round and then split into two identical, ...

A team of scientists has mapped the regions surrounding stem cells in planarians—small flatworms that are famous for being able to regrow whole bodies from small fragments—and discovered something ...