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Colorado Becomes First State To Restrict Methane Emissions

Methane is a potent greenhouse gas from oil and gas production. The rules require companies to find and repair equipment leaks. The rules also will reduce air pollution that contributes to smog.

Deadly MERS Virus Circulates Among Arabian Camels

A new virus in the Middle East has sickened more than 180 people and killed an alarming 43 percent of them. But scientists haven't been sure where the virus originates or how people catch it.

Meteorite Impact On Moon Sets Record As Brightest Ever Seen

A high-speed collision on the moon's surface was recorded on video and created a bright flash that would have been visible on Earth for eight seconds, scientists say.

Sriracha Chemistry: How Hot Sauces Perk Up Your Food And Your Mood

Sriracha and other spicy condiments make us feel so good, even when they burn so bad. So what's going on in our tongues? A video breaks down the beloved hot sauce into its molecular components.

At 4.4 Billion Years Old, Oz Crystals Confirmed As World's Oldest

Zircon crystals found in sandstone on an Australian sheep ranch are so tiny that you'd need a magnifying glass to see them. But recent measurements confirm they offer our earliest glimpse of Earth.

Industry Challenges EPA's Greenhouse Gas Rules In High Court

The case focuses on the Clean Air Act permitting required of companies that want to build or modify facilities expected to emit a lot of gases. Critics call the requirement costly and time-consuming.

Explorers' Aim For Perilous Polar Trek: 'Get Home In One Piece'

Two men broke a record for traveling from the coast of Antarctica to the South Pole and back, on foot. They retraced the steps of a British Royal Navy officer, whose team died on the journey in 1912.

Forecasting The 'Future' By Tapping Into Human Consciousness

Physicist Michio Kaku studies what were once only philosophical questions about the human mind. He delves into the brain and our understanding of its functions in his new book, The Future of the Mind.

How Dogs Read Our Moods: Emotion Detector Found In Fido's Brain

Anyone who's had MRI knows how hard it is to lie motionless. But the dogs that participated in this brain-scanning experiment aced the test. Maybe the treats did it.

Scientist Switches Position, Now Supports Keystone XL Pipeline

Opponents of the Keystone XL Pipeline lost an ally. David Greene talks to Marcia McNutt, one of the country's most influential scientists, about her decision to no longer oppose the pipeline.