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To block a variant this transmissible, scientists say you need an N95 or other high-filtration mask. Here's how to find a good one and when to wear it.

A power company has turned off the electricity in parts of Northern California to prevent equipment from sparking wildfires. Residents are getting used to life without power during fire season.

The wetlands damaged in southern California's oil spill had been restored decades ago, and are some of the last remaining in the area. Ecologists say damage from the recent spill will be long lasting.

Officials say the unstable building poses a threat to the people involved in ongoing search operations. A storm expected to hit parts of Florida has exacerbated concerns.

At a prison in Maine, residents tend a garden that produces much of the facility's food. Advocates say it's a good way to avoid the unhealthy diets served at other prisons and teach useful skills.

There's only been one other year — 2005 — that Greek names have been needed. The National Hurricane Center on Friday announced storms called Alpha and Beta have formed in the Atlantic.

Scientists went to extraordinary lengths to eradicate smallpox from the world. Rahima Banu is now recorded as having the last known naturally-occurring case of the deadly form.

From a possible Olivia Rodrigo sweep to the probability of someone mentioning "The Slap," here's what to expect at the 64th Annual Grammy Awards this Sunday.

The hope is that a person who has recovered from COVID-19 would have some protection against reinfection in the future. Here's what researchers do — and don't — know.

Idaho and Montana frequently battle big wildfires this time of year. But this season their biggest challenge is smoke from West Coast fires that has led to shutting down schools and other problems.