We've never seen global sea ice levels this low before
Levels are at the lowest they have been in decades, maybe millennia.
SpaceX's comeback launch was a success
It's back to business for the private spaceflight company.
Scientists discover a cosmic-scale particle accelerator
Entire galaxy clusters have been swept up in this phenomenon.
Toyota's futuristic Concept-i, and more in the week that was
And so much more car news from CES.
Deepest X-ray image to date uncovers a black hole bonanza
It's a window into the histories of both black holes and the universe.
NASA announces two new missions to study the early solar system
Lucy and Psyche will look for history in metal asteroids.
NASA has a new plan to observe black holes with cosmic X-rays
The agency will launch three new space telescopes in 2020.
NASA will resume testing its Hubble successor this month
There's a lot more analysis to be done before the James Webb Space Telescope reaches the heavens.
NASA's chief scientist Ellen Stofan leaves the agency
She believes the search for extraterrestrial life is of the upmost importance.