The past tense is used for things that have already happened. He was sticky. The present tense is used when something is happening now or when something happens regularly. He is sticky.

Greg Harlin/Wood Ronsaville Harlin The most destructive explosion on earth in the past 10,000 years was the eruption of an obscure volcano in Indonesia called MountTambora. More than 13,000 feet ...

Recessions have grown increasingly infrequent over the past four decades. Let's take a look at all of the official U.S. recessions since the Great Depression, focusing on common measurements of ...