In 1961, MIT meteorologist Edward Lorenz was inputting numbers into a weather prediction program. His model was based on a dozen variables, the value of one being .506127. When he ran the model again, ...

Add Yahoo as a preferred source to see more of our stories on Google. A monarch butterfly (Dannaux plexippus) flaps its wings in Piedra Herrada Sanctuary, Mexico. Might this start a chain of events ...

A daring surgical procedure has given a doomed monarch butterfly a new lease of life. The delicate operation was captured on ...