This is the first time scientists have recorded the heart rate of a blue whale, the largest animal on Earth.

A new study examines how early animals might have endured the worst ice age in Earth's history.

Rescuers are racing to save koalas as a barrage of bushfires roar across the country.

Did you know prehistoric mushroom cults may have inspired Santa Claus? Here are a few more interesting facts you may not know about magic mushrooms

The black rhino calf appears healthy and is nursing regularly, according to zoo officials.

Researchers hope to help humans borrow some secrets of bear biology.

If you leave a hummingbird feeder out in winter, will it help the birds or tempt them not to migrate?

Even after nurturing and enchanting humans for thousands of years, this iconic river is still full of surprises.

And why a zoo is asking the public to help capture them.

The 2020 Great Backyard Bird Count is a 4-day event when "citizen scientists" can enjoy nature while keeping tabs on local bird populations.

The move would weaken the century-old Migratory Bird Treaty Act.

Extra food seems especially helpful early in the breeding season, according to a new study.

The ancient holiday has become like a 'Jewish Arbor Day' in modern times, bringing religious and secular observers together for ecological reflection.

It's unclear exactly how many polar bears are left in the wild, but several populations likely face grave danger from climate change.

In honor of Earth Day, MNN takes an animated look back at several decades of U.S. environmentalism in this video.

From synchronized singing to 'stink fights,' these peculiar primates are full of surprises. They're also disappearing.

Bats don't pose an unusual risk among mammals, research suggests, and bat viruses we do get often rely far more on us than bats.

Circus animal gets away from handlers, causes a stir during rush hour.

'All the convenience of using your iPad to read the news online, but without the Internet's annoying habit of being completely free,' says host of 'Colbert Repo

Drone footage captures rare Bryde’s whale mother and baby feeding. There are only about 200 of the creatures known to swim in those waters.

A couple of dogs snuffling through the backyard brush find a really big surprise: A bear!

A small woodpecker lands on a cabbie's door and gets a warm guided tour of the Windy City.

An award-winning photographer casts his lens on one of the most surreal natural landscapes in North America that just recently became a national park.

Polyester fabric is not biodegradable. To understand why, it helps to know how it's made and why it sticks around so long.

Wine from Rioja Alavesa, the Basque subregion of Rioja, has been named a UNESCO Biosphere Responsible Tourism region.

Chicken's always the scapegoat, but there are other suprising sources of salmonella. Here are other foods that can harbor the bacteria and how to avoid it.

Artificial sweeteners have been linked to diabetes, stroke and dementia.

Mooncakes are a traditional part of the Mid-Autumn Chinese festival. But there's more to the legend of this pricey pastry.

If you're looking to improve your outlook, the produce bin is a good place to start.

Rotisserie chickens are convenient, but there are reasons you may want to save them for emergency chicken needs only.

Treat these foods with caution to avoid food poisoning.

Empty your bookshelves, grab a string of old lights, and craft a tree that will make you smile every time you see it.

Not buying things can be difficult even when you're determined not to, so before you start, ask yourself the right questions.

Opt for dips with beans or nuts as the base and you'll instantly up the nutrition factor of your Super Bowl spread.

If a Waffle House is closed, that's a good indication that things are not normal in the area.

Sometimes in life, it's hard to stay on task. That's where procrastibaking comes in. We have recipes.

As Uncle Sam scrambles to revitalize the economy, many are wondering: Is renewable doable?

Some say evolving bugs and lax oversight are making salmonella even more dangerous.

Hybrid sales are down, but federal efficiency rules could fuel a comeback.

It can be better for the climate than gasoline, but this colorless liquid isn't always as green as it seems.

U.S. particulate pollution isn't the deadly threat it once was, but the dangerously tiny specks still often plague big cities as well as rural wilderness.

Most Americans live in urban areas, forming huge hot spots of energy consumption. But while rural residents use less energy overall, cities are often slicker ab

It's almost inescapable, and while the FDA says BPA is safe at normal levels, a growing body of research has begun to suggest otherwise.

From West Nile virus to dengue fever, mosquitoes seem to be getting better at sneaking diseases into the U.S. lately. It's just a hint of what's to come.

What is fracking and is fracking safe? The controversial natural gas drilling technique has some wondering if a U.S. natural gas boom is worth the risks.

Salt saves lives on icy roads, but it can have the opposite effect in nearby ecosystems. Here's a look at the pros and cons of it and other de-icers.

Floods are the most common natural disaster in the United States. Here's a closer look at how they occur and how to stay safe.

Fireworks can unleash a shower of toxins into soil and water, and scientists are only beginning to figure out what that means for human health.

A huge sea of plastic trash is swirling in the North Pacific — part of an even broader plastic plague that's growing in oceans worldwide.

A fungus is obliterating North America's bats in 'one of the most severe wildlife diseases ever recorded,' scientists warn.