On Mars, the strong magnetization in the highland ... Here, we argue instead that the Martian dynamo turned on less than 4 Gyr ago and turned off at an unknown time since then.

PBS sued President Donald Trump Friday to block him from cutting funding for the public television station, days after NPR also filed a lawsuit to stop the move. PBS and Lakeland PBS in Minnesota ...

The latest news and headlines from Yahoo News. Get breaking news stories and in-depth coverage with videos and photos.