The massive ice sheet on Greenland is shrinking as the climate gets hotter, pouring fresh water into the Atlantic Ocean. That could be setting off a chain reaction that's altering ocean ecosystems.

Anthony Comstock pushed Congress to crack down on what he saw as harmful vices, such as pornography and contraception. An 1873 law named for him has appeared in recent court battles over abortion.

Boys born to mothers who got COVID-19 while pregnant seem to have a higher risk of subtle developmental delays, including those associated with autism spectrum disorder.

Santos enters the race as an underdog — abandoned by many fellow Republicans while facing investigations over a myriad of allegations about falsehoods during his last campaign.