Sometimes stem cells in the jaw don’t work quite like they’re supposed to.
The single-celled menace rarely infects humans. That’s what makes it so hard to treat.
Two specialized muscles give them a range of expression that wolves’ eyes lack.
President Trump now says he wants NASA to focus on Mars instead of a second moon landing.
Here are six other living things you don’t want to get stuck in your eye.
A woman with a rare condition gave birth to three babies: one last month, and twins four weeks later.
A study on rats offers the first biological evidence that small doses of hallucinogenic drugs could have therapeutic benefits.
Senator Amy Klobuchar reportedly once resorted to this strange method. So I tested out some combs.
A hard lesson in a very strange party tradition
Our editors pick their favorite movies, television episodes, music, books, podcasts, and more from the past year
Headed into the government shutdown. Plus withdrawing troops, the five years that changed modern romance, the DNA legacy of the Spanish Inquisition, and more
More Americans were killed by guns in 2017 than ever before. The majority of those deaths were suicides.
Mattis resigns. Plus Don DeLillo and the 50th anniversary of the Earthrise image, how far away we are from self-driving-car utopia, food-stamp requirements, and more
Facebook’s still sloppy with your data. Plus withdrawing troops from Syria, saving a species from extinction, and more
Supercalifragilisticexpialidocious for 2018 screens. Plus Michael Flynn’s sentencing, Instagram scammers, China in the world, and more
Echoes of Trump-campaign tactics in 2016 Russian election interference. Plus Obamacare’s future, Cory Booker says he can still love Trump, the history of the weighted blanket, and more
House Democrats speak out against a move toward deporting certain Vietnamese immigrants. Plus an eighth person pleads guilty in the Russia investigation, the decline of liberal arts, Janet Jackson honored, and more
Data collection to believe in
Somehow, a man coughed up an intact blood clot shaped like a lung passage.
After a gunman killed 11 at the Tree of Life synagogue in Pittsburgh, hundreds of thousands of non-Jews attended Shabbat services around the world.