For decades birth control research focused on women. Now there's a new push to develop gels, pills or other products that could keep men from getting their partners pregnant.

Bats and death metal singers have more in common than a love of the dark. A new study has found that some of bats' lower frequency calls appear to use a technique similar to death metal growling.

The operation is one of the largest mobilizations yet in President Nayib Bukele's crackdown on street gangs.

Lionel Messi put Argentina ahead with his third goal at this year's tournament and ninth in total at the World Cup — one more than Diego Maradona.