The Bortle Light Pollution Scale is a good model for understanding how tainted our night skies are by light pollution.

'The City Dark,' the latest from Brooklyn-based filmmaker Ian Cheney, explores the effect of light pollution on the natural environment and on human health. It

Skylines and landmarks from across the globe turn off their lights for 60 minutes in celebration of Earth Hour.

Do you even know what the night sky looks like sans human interference?

Photographer's exploration of the beauty of man-made illumination around the world reflects humankind's dominance over the planet.

Bright skies at night make some trees bud early for spring.

Chengdu's wild plan involves a reflective satellite or "moon" that would beam down a "dusk-like glow" within city limits.

Birds that produce 'flight calls' during night migration may be more vulnerable to light pollution, a new study finds.

Star Count 2019 engages stargazers in England and draws attention to the growing threat of light pollution.

Get some blackout curtains. More and more studies show artificial light can harm your health.

Watch as 15-year-old Ann Makosinski explains how she figured out the voltage and circuitry necessary to facilitate her design.

The end of summer and beginning of autumn mean warm days and cold nights; bring one of these sweaters along to keep comfy.

White-nose syndrome is obliterating bats across North America, but a new study suggests the fungus behind the plague has an Achilles' heel.

A new study looks at the co-evolutionary 'arms race' between a brood parasite and its hosts.

Iceland's ION Luxury Adventure Hotel isn't so much about the hotel itself but about the stunning, otherworldly landscapes that surround it.

Photographer Chris Perani painstakingly combines thousands of exposures to create each individual image.

Attention Earth Day shoppers: The most highly anticipated, wildly expensive energy-saving light bulb out there, the L Prize-winning winning 60-watt equivalent L

The search engine shows the globe some love in celebration of April 22.

There are many candlelit activities to do with family or friends when you turn off the lights for an hour to raise awareness about climate change.

In 'Caribou Rainforest,' wildlife photographer David Moskowitz tracked elusive caribou through their rainforest habitat in the Pacific Northwest.

A video interview with Benoit Jacob, the luxury carmaker's new electric and hybrid vehicle line's designer.

The autonomous aircraft Mars Helicopter heralds the beginning of a new era in our exploration of the red planet.

Using a diesel engine to power a hydraulic power system, Lightning hopes to take X Prize.

An eel named Miguel Wattson is behind the holiday display at the Tennessee Aquarium.

In Stranger in the Woods, author Mike Finkel explores the famous Maine recluse Christopher Knight and why he stayed alone for 27 years.

The Monkey's Paw book store in Toronto has a Biblio-Mat that distributes random rare books to customers for only a few dollars.

Botanist and biologist Francis Hallé introduces a new world of rainforest flora in his latest art-driven book.

This explore.org film shows how service dog Abby and others helped in the aftermath of Sept. 11, 2001.

Photographers Kelly Pratt and Ian Kreidich capture ballet dancers and dogs in playful moments together.

How do you build the world’s lightest metal? Make it mainly from air, according to scientists.

Formed by material falling onto a newborn star, the two beams of light shoot outward to create the dual-sided lightsaber appearance.

Plasma presents a possible source for the blade, but lots of practical concerns remain.

The newly identified species isn't the only glowing shark in the ocean, but it is the first found in the Pacific coast of Central America.

Part work of art, part tribute to farmers who love the earth they work, this new book deserves to be out where people can see it.

“Down to Earth” highlights the sustainability inititaives at several of California’s wineries and opens up your sustainable wine choices.

Artificial photosynthesis could produce the perfect clean fuel to run everything.

The Quadrantids will peak Jan. 4 with good viewing opportunities in North America.

Clark Howard offers more money saving tips on weather stripping and light bulbs.

Research suggests white owls have a key psychological advantage when hunting by moonlight.

The light from the moon influences more than you might suspect, including animal behavior and farming.

A U.S. company is developing a 'photonic fence' to fend off mosquitoes, part of a broader effort to control pests with lights instead of chemicals.

Watch the northern lights from home, courtesy of explore.org through their live camera in Canada.

Scientists genetically engineer a new strain of female mosquitoes that cannot fly, hoping the handicap will curb dengue fever outbreaks.

New research reveals that mushrooms and some vegetables can multiply rapidly when struck by lightning.

Researchers say the mutant mice study could increase our understanding of perception systems.

Imagine your city illuminated at night by glow stick-like lighting generated entirely from living organisms.

Scientists created the glowing effect without any genetic modification.

The International Dark-Sky Association has a few ideas to reduce light pollution from sports facilities.

With more sophisticated satellite imagery, we can view Earth from space in new, enlightening ways that expand our understanding of the planet.

11-year-old camper had lost her passport.