Will heavy rains make the Pickett Fire burn scar slide?

People in the Pickett Fire region of Napa County got phone alerts for potential flash flooding on Monday.

Canada's Marineland may euthanize whales after Ottawa denies aid, export

Marineland has asked the Canadian government for emergency funding to feed and care for its whales, warning that euthanasia may be imminent without financial help.

UC Berkeley physicist 'completely stunned' to receive Nobel Prize

“I was sitting there completely stunned. It never occurred to me anything like this would ever happen," the scientist said in an interview Tuesday.

Small truly 'wild' cats worldwide are threatened with extinction

There are the small number of truly wild-born cats -- from tigers, the world's largest, to the rusty-spotted cat, the world's smallest.

NASA has 36 projects you can help with right now

NASA is inviting the public to take part in 36 “citizen science” projects that let volunteers contribute to real scientific discoveries.

Decapitated California sea lion: $20K reward issued

The National Marine Fisheries Service on Monday announced a $20,000 reward for information leading to a balding man with a hunting knife whom they say was observed decapitating a dead sea lion.

Mysterious streak of light across the Bay Area explained

A light streaking the Bay Area sky on Thursday night sparked the curiosity of those who witnessed it and those who are seeing the videos online. Was it a meteor? A piece of fire debris?

Curious light streaking the sky seen throughout the Bay Area, captured on video

KTVU received several calls, as well as photo and video submissions, of a mysterious light streaking across the sky that resembled a meteor on Thursday evening.  

Yellowstone National Park trail shut down after first bear attack in 4 years

Grizzly bears and black bears coexist in Yellowstone, according to the National Park Service, and it's unclear which one was involved in the attack.

Life on Mars: What we know after NASA's announcement

NASA scientists say a rock sample collected by the Perseverance rover in Jezero Crater may contain the strongest signs yet of ancient microbial life on Mars, though more analysis is needed before drawing firm conclusions.

Study reveals pre-CTE damage in brains of even young contact-sport athletes

An NIH-funded study of athletes under 51 found repeated head impacts can cause early neuron loss and brain inflammation years before CTE is detectable.