Your muscles are ready to run, whether you like it or not.
Articles from Popular Science
Spring is advancing much faster in northern areas than it is in southern areas throughout three migration routes.
The smartwatch's new ECG function brings fitness trackers into real medical care.
It's still too soon to know if anything will threaten the United States.
From northern lights to lightning bolts
The machine is called Frontera.
And why you should probably leave most baby squirrels alone.
Extremely hot, dry weather in the US is no longer as rare as it used to be.
Here's how to find them.