Learn how to calculate when and where two trains will meet! This video walks you through the process of using relative speed and distance to find the exact point and time of intersection. Perfect for ...

Three thought experiments involving “demons” have haunted physics for centuries. What should we make of them today?

Whether you’re a new runner or an experienced one, the stride length you naturally choose is likely your most efficient, ...

It is something like the "Holy Grail" of physics: unifying particle physics and gravitation. The world of tiny particles is described extremely well by quantum theory, while the world of gravitation ...

When is winter? Weather forecasters in the Northern Hemisphere will tell you Dec. 1 through the end of February, which is ...

Clocks tick faster on Mars than they do on Earth, in part because Mars experiences less gravitational pull from the Sun. Now scientists have calculated just how much faster -- 477 microseconds, on ...

To better understand which social media platforms Americans use, Pew Research Center surveyed 5,022 U.S. adults from Feb. 5 to June 18, 2025. SSRS conducted this National Public Opinion Reference ...

Man laying on bed at late night in a dark room checking his smartphone. Internet addiction. Man laying on bed at late night in a dark room checking his smartphone. Internet addiction.Moment ...

For years, the idea that we might be living inside a vast computer program has drifted from philosophy seminars into blockbuster movies and Reddit threads. Now a group of theoretical physicists say ...