Trump Calls NASA Astronauts as They Conduct the First All-Female Spacewalk

NASA reached a milestone on Friday morning when two Americans ventured out of the International Space Station to replace a power controller: The astronauts, Jessica Meir and Christina Koch, had undertaken the first all-female spacewalk.

How one high school’s dispute reflects the struggle to teach California’s science standards

As California schools implement the state's new science standards, parents at one high school are objecting to a teaching approach they say is short-changing students.