3D printing in outer space and on alien planets comes with otherworldly challenges.
A centuries-old experiment shows the differences between classical and modern physics. Physicists use thought experiments like this to think about how objects move both on Earth and in the stars.
Philadelphia has a high rate of gun homicides despite having relatively few gun owners and gun stores compared with other US cities.
Scientists don’t often have the time to get all their equipment set up to study incoming meteors from space. Instead, they can study capsules from space missions as ‘artificial meteors.’
Liquid water, breathable air and a sustainable food supply are three of the essentials Mars would need for people to live comfortably there.
Even once researchers can reliably get more power out of a fusion reaction than they put in, they’ll still need to overcome engineering challenges to scale up fusion energy.
Trump has begun another trade war. Here's a timeline of how we got here
Canada's leader laments lost friendship with US in town that sheltered stranded Americans after 9/11
Chinese EV giant BYD's fourth-quarter profit leaps 73%
You're an American in another land? Prepare to talk about the why and how of Trump 2.0
Chalk talk: Star power, top teams and No. 5 seeds headline the women's March Madness Sweet 16
Purdue returns to Sweet 16 with 76-62 win over McNeese in March Madness
