Animals
Some Greenland polar bears are surviving with very little sea ice
The ‘glacial mélange’ on which they’ve come to rely — a mix of ice, snow and slush — could be a temporary refuge for some polar bears.
Word of the Week
Tech
Scientists Say: Virtual reality
Virtual reality is an immersive, 3-D artificial environment created by a computer.
Explainers
Space
Explainer: All about orbits
A handful of rules can describe the route some object repeatedly takes around another in space. Calculating that path, however, can be quite complex.
Technically Fiction
Animals
Monstrous mammals would break the body rules
Giant mammals and people thunder through our movies and books. But real mammals can only get so large before they can’t take the heat.
What's Hot
En Español
Watch This
Watch how a western banded gecko takes down a scorpion
New high-speed video reveals how normally mild-mannered geckos can violently shake venomous prey into submission.
