To participate, submit your response here by July 10 at 9 a.m. Eastern. This week’s winners will be announced by July 22. By The Learning Network Heeva Alavi, an Iranian-American, writes about her ...

Tropical trees are dying faster than ever, and it's not just heat or drought to blame. Scientists have uncovered a surprising culprit: ordinary thunderstorms. These quick, fierce storms, powered by ...