New research suggests that lakes of liquid water could be buried in the icy crust of Europa, a moon of Jupiter. The processes that create the lakes could also provide nutrients crucial for life on Europa, the scientists say.
Tiger Woods scrambled to qualify for this week's Deutsche Bank Championship outside Boston. The tournament, which benefits the Tiger Woods Foundation, is the second round in the PGA Tour's FedEx playoffs.
The campaign hopes to increase the ranks of American volunteers from 61 million to 100 million by 2020.
Students arriving on campus encounter supersized efforts to encourage them to cast ballots.