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Democratic attorneys general from California and New York are suing the Trump administration over its plans to buy back offshore wind leases as it seeks to discourage expansion of wind energy in favor of fossil fuels.

After a summer spent packing away sockeye salmon, Alaska's heftiest brown bears are ready to throw their weight around.

Hurricane Polo grew into a Category 5 storm Tuesday in the eastern Pacific off southwestern Mexico and was forecast to bring heavy rain to southwestern Mexico but remain offshore.

For more than 25 years, mifepristone has been approved for abortion in the U.S. But mifepristone and a similar drug have also been proven to treat conditions like uterine fibroids and endometriosis. As anti-abortion groups lobby to further restrict . ...

An innovative treatment is helping injured penguins get back on their feet in Chile. Stephanie Sy reports on these special suits.

U.S. President Donald Trump and Chinese leader Xi Jinping are expected to meet this week to discuss artificial intelligence.

If we are lucky enough to live full lives and form meaningful relationships, chances are, we will also experience loss, and with it, grief. As common as grief is, it's also mysterious. Horizons guest moderator Ali Rogin explores the science of grief ...

A previously unknown cat species has been identified in plain sight: at a wildlife sanctuary in Bolivia, where the small, spotted feline had been living for years after being taken in by a local family.

This week, Democratic representatives introduced a resolution to block the Trump administration's new civilian nuclear agreement with Saudi Arabia. The deal paves the way for the U.S. to help Saudi Arabia build a nuclear power program for peaceful .. ...

As wildfires grow bigger and hotter in many parts of the world, researchers have embarked on an airborne mission to learn more about the severe storm clouds that sometimes form over the most intense blazes.