Lawn Tractor vs. Zero-Turn Mower: All Riding Mowers Aren’t Created Equal, So Which Is Better for You?

If you just bought a new house with a big yard, or your old riding mower is about ready for replacement, you’re probably faced with the question: Zero-turn or lawn tractor? There are arguments to be ...

The Mitochondria Is the Powerhouse of the Cell—And Maybe Your Mood, Scientists Say

The researchers propose that brain mitochondria work in two complementary modes: a long-timescale “baseline” mode that keeps neurons and circuits primed, and an “activity-evoked” mode that delivers ...

For Eons, Human Evolution Barely Budged—Then It Exploded. Now Scientists Know Why.

Human evolution wasn’t a steady march toward bigger brains and better tools, a new study argues. Researchers compared 87 fossil skull fragments against six evolutionary models ranging from random ...

Uh, We’re Running Out of Sand—And It’s a Bigger Problem than You Might Think

We mine more sand every year than any other solid material, and scientists warn that we’re taking more than the planet can replenish.

Archaeologists Discovered the Remains of 30 Ancient Longhouses From an Unusual German Settlement

The Roman-era longhouses were built along a popular trade route from the time in an area where most people lived on isolated farmsteads.