Climate
As winters warm, athletes must cope with harder snow and tricky ice
Ice arenas and artificial snow now dominate the winter Olympics. Athletes there — and everywhere — may need to adjust how they train and perform.
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Space
Scientists Say: Spacetime
Weaving together the concepts of space and time allows scientists to understand gravity and more.
Explainers
Chemistry
Explainer: What is chirality?
Chiral molecules are mirror images of each other. They might not seem all that different — but can have drastically different effects in medicine, materials and more.
Experiments
Earth
Experiment: How does the tilt of Earth’s axis affect the seasons?
Seasons have nothing to do with Earth’s distance from the sun. The real reason for the seasons is the tilt of Earth’s axis.
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Winter Olympics 2026
Watch This
How to make a pitched ball curve to your will
A range of tricks pitchers use to get curve all come down to the thin layers of air next to the ball — and how a ball’s spin and seams affect them.
