Science

There’s a lot to love about grasslands — the sound of the wind blowing through them, the way the colors change with the seasons, how ...

Cheetahs were declared extinct 70 years ago in India. Ecologists hope its reintroduction will boost efforts to preserve the country's vast grasslands.

In the early days of the pandemic, life on the streets changed. Traffic was clear, and the roads felt nearly deserted. Bumper-to-bumper c ...

NASA smashed a spacecraft into an asteroid in an attempt to throw it off course. The mission succeeded beyond expectations, officials said.

'Breathless' tells the story of the worldwide scientific quest to understand and trace the origins of Covid-19 and develop treatments to fight the deadly virus.

The University of Delaware and others are proposing that Brandywine Creek and Red Clay Creek join the National Wild and Scenic Rivers System.

Boston Dynamics and five other robotics companies have signed an open letter saying what many of us were already nervously hoping for anyway.

Sharpless, a Philadelphia native who attended the Friends Central School, previously won a Nobel Prize in 2001 and is now the fifth person to receive the award twice.

In images streamed as the impact neared, the egg-shaped asteroid, called Dimorphos, grew in size from a blip on screen to have its full rocky surface come quickly into focus.

Environmental advocates are speaking out against a Pa. DEP plan to clean up decades-old contamination at the site of the former Bishop Tube facility in East Whiteland Township

Tom Mustill was sure he was going to die — that was the last thing he thought as he watched a humpback whale arc majestically out of th ...

On the anniversary of President Kennedy's speech on the race to the moon, we look at dramatic advances in U.S. space science, from commercial flights to the Webb telescope.

Around the world, at dawn, something magical happens. As the sun rises, nature seems to wake up, and different species break into a choru ...

In his latest book, primatologist Frans de Waal asks the question, "What can the world of apes and monkeys teach us about gender, sex and biology?

NASA has called off its second launch attempt for its new moon rocket because of yet another fuel leak.