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Ghost forests creep up U.S. East Coast
Stone Age footprints are earliest evidence of humans in North America
'Grow up': U.K.'s Boris Johnson says world must face climate change
Climate change may trigger migrations around the world. They've already started in Guatemala.
Inspiration4 astronauts give St. Jude’s patients a tour of Dragon capsule
Exclusive: Inside look at world’s first 3D-printed rocket
It once took thousands of American engineers decades to get something into space. Now Relativity Space says its 3D printers can make a rocket in as little as two months. With a first launch planned for 2022, NBC News’ Jacob Ward speaks with CEO Tim Ellis about cutting down on the cost of space travel and his dream of bringing people to Mars.
Ozone hole over Antarctica larger than usual, scientists say
Ancient handprints pre-dating earliest cave paintings may be the oldest-known art
SpaceX makes history with first all-civilian spaceflight
All-civilian SpaceX crew set to launch into orbit in historic mission
Civilian astronauts set to blast off in Inspiration4 launch
Changing global and political landscapes have made the kind of broad and bipartisan agreements reached in the 1970s seem impossible.