Saber teeth in predators evolved many times. Did it lead to their extinction?
A new analysis suggests saber teeth were highly specialized for puncturing prey, ultimately at the cost of durability.
Environment
Trump is withdrawing from the Paris Agreement (again), reversing U.S. climate policy
President Trump issued a barrage of orders Monday targeting Biden-era initiatives on global warming. The decisions come on the heels of the hottest year ever recorded.
How to keep your pets safe from bird flu
A few cats have died from bird flu, and there have been a handful of recalls of raw pet food. Here's what pet owners should know about the risks, and how to keep pets safe.
Advocates worry about North Carolina's old growth forests, damaged by Hurricane Helene
The old growth forests of Western North Carolina took a beating from Hurricane Helene. Now they've lost a bid for federal protection. This worries advocates that the forests could soon vanish.
Trump has declared a 'national energy emergency.' What does that mean?
President Trump made energy a top priority on his first day in office, declaring a national emergency – which no president has ever done before. The implications aren't clear.
Cleaning up after the LA wildfires is dangerous. Here's how to protect yourself
The ash and debris created during the burns could be loaded with dangerous materials. Experts suggest taking care.
Is the air quality index actually useful right now?
The air has improved in the LA region as firefighters get blazes under control, but there are questions about how safe the air actually is.
Some Los Angeles homes made it through the firestorm. Here's how
Houses are still standing in the burn zone in Los Angeles, ones that made it through the fires. Experts on the ground are finding those homeowners made some key preparations.
Development is taking a toll on Florida's precious springs
The state has been slow to adopt rules to protect Florida's endangered springs. While a boom in residential construction has increased the amount of groundwater being taken from the aquifers.
U.S. electricity demand is set to explode. That will make it harder to cut climate pollution
Analysts say the country will burn a lot more natural gas in the coming years to meet soaring electricity demand, potentially locking in decades of heat-trapping emissions.