John Metcalfe

Cigarette Butts: Fodder for the Future's Green Tech?

Korean researchers may have uncovered an innovative use for tar-stained filters.

The Drought-Ravaged West Sprouts a Massive Pyrocumulus

This stunning cloud was caused by updrafts from wildfires.

Too Lazy to Unlock Your Phone? Try This 'Digital Tattoo'

Press your phone against this creepy skin patch instead of fumbling with that pesky code.

City Maps Made by Judgmental Jerks

These fearlessly biased maps point out areas of "religious wackadoodles," "white guilt," and "Kardashian watchers."

This App Generates Hidden-Message Orbs Your Friends Must Physically Locate

Designed by brain scientists, "Traces" seeks to make messaging more meaningful.

Craft Beer Drinkers: Be Wary of 'Exploding Swill'

"One piece of glass flew into someone's open mouth," reports a man attacked by beer.

The Bay Area's Worst Bike Ride Is Also Its Best

This ride's for you (if you like hulking seafaring machines and a Superfund site).

Gelatinous Sea Creatures Storm San Francisco

Squishy, intergalactic-looking "hydroid polyps" have washed up on beaches by the thousands.

Crowdsourcing Lightning Strikes Actually Works Pretty Well

A Dusseldorf-based network has linked more than 800 low-priced lightning detectors around the globe.

How Much Hotter Will Your City Be in 2100?

An interactive map shows the predicted high temperatures in 1,001 U.S. cities and towns.

When Cooling Towers Get Demolished, They Produce Mammoth Smoke Rings

It's like they're occupied by cigar-sucking giants.

The U.S. Cities With the Worst Climate Change-Related Flooding

Rising sea levels have kicked up flood days by as much as 900 percent along parts of the East Coast.

Thanks to Us, Antarctica Has Lead Poisoning

Industrial pollution reached the South Pole long before the first explorers arrived there in 1911.

Urban Heat Islands Are Helping Kill Trees

The warmer conditions cities create make plant-eating pests thrive.

Imagining the Gaza Invasion in Major U.S. Cities Through Maps

There are 1.8 million people in Gaza. What would that look like in your city?

Looking Back at America's Largest Hailstone

On this day in 2010, a town in South Dakota was visited by a two-pound ice monster from the sky.

A Lovely Animation of the Planet's Hot-Weather 'Misery'

Where in the world is it unbearably hot right now?

Wisconsin Is Getting Smothered by Millions of Gross, Horny Flies

Close your mouth while looking at these photos, or a bug might fly in.

The Rooftop Homes of Cairo's Racing Pigeons

Pigeon breeding has a long and rich history in the region, dating back 4,000 years.