On the campus of Houston University, students meet in small groups, sit alone at computers and attend virtual meetings.

Cots, tents, and respirator masks poured into the eastern Caribbean island of St. Vincent as officials expected to start distributing them on Saturday, a day after a powerful explosion at La Soufriere volcano uprooted the lives of thousands of people who evacuated their homes under government orders.

Duke University will require all new and returning students to present proof of vaccination to student health officials before they can enroll for the fall semester, the school's president said Friday.

Four dead gray whales have washed ashore San Francisco Bay Area beaches in the last nine days, with experts saying Friday one was struck by a ship. They were trying to determine how the other three died.

Two dead whales have washed up on the same stretch of Bangladesh coastline in two days, officials said Saturday, raising suggestions that they were killed by sea pollution.

The helicopter that NASA has placed on Mars could make its first flight over the Red Planet within two days after a successful initial test of its rotors, the US space agency said Friday.