Koalas live where it’s often hot and dry. But koalas can’t sweat! So how do they keep cool? Jessi has the answer!

Royal jelly! For bees, it’s what makes all the difference between a queen and a worker.

Cicadas are small insects, but they're famous for being one of the loudest animals in the world!

Summer, Fall, Winter, Spring. Every new season brings new...diseases.

Thunder is not something you normally associate with a winter storm. However, if the conditions are right, you might experience thundersnow.

Grizzly bears stick to a mostly vegetarian diet in sync with plant growing seasons. However, as grizzlies' habitats grow smaller, food is harder to come by. Using NASA satellites, scientists track the shifting, interrelated patterns of...

Humankind has been looking for the giant squid (Architeuthis) since we first started taking pictures underwater. But the elusive deep-sea predator could never be caught on film. Oceanographer and inventor Edith Widder shares the key...

Jessi and Squeaks are ready to play outside, but there’s a unique plant they should be sure to avoid: poison ivy!

It’s wintertime in the Northern Hemisphere, which means cold weather, shorter days, and… new relationships? It’s known as cuffing season, and there are actual psychological reasons you may be more inclined to settle down with a romantic...

Fire seasons can be bad enough on their own, but it turns out sometimes forest fires that appeared to be dead, turn out to have just been lying in wait.

It's spring where Jessi and Squeaks live, and with the spring comes a really cool part of our planet's journey around the sun: the spring equinox!

Deepika Kurup has been determined to solve the global water crisis since she was 14 years old, after she saw kids outside her grandparents' house in India drinking water that looked too dirty even to touch. Her research began in her...

Summer is coming to a close, but there is still time to take a cool, refreshing dip in the water of your choice. Before you do, be sure to check out this swimming compilation to get answers to all the questions you didn’t even know you...

At TED2009, Al Gore presents updated slides from around the globe to make the case that worrying climate trends are even worse than scientists predicted, and to make clear his stance on "clean coal."

Plants need sunlight to live, but they also need to block the sun's more harmful rays. Plants can't put on sunscreen or find shade, so how do they avoid getting a gnarly sunburn?

There’s a huge seasonal difference in death rates that is propelled by a variety of factors including pathogen behavior and anatomical response to temperature changes.

In the uS, most kids have a very long summer break, during which they forget an awful lot of what they learned during the school year. This "summer slump" affects kids from low-income neighborhoods most, setting them back almost three...

Day by day, country by country, we tend to measure seasons differently.

Around the world, there are lakes that disappear without warning. Then, even stranger, they come back! This can happen for lots of different reasons, and the fact that they vanish and reappear reveals some surprising connections.

Quick Questions explains how cold winter air triggers the same processes that form clouds, fog, and dew so you can see your breath!

Did you know you can fall in love with anyone just by asking them 36 questions? Mandy Len Catron tried this experiment, it worked, and she wrote a viral article about it (that your mom probably sent you). But ... is that real love? Did...

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.

If you ask someone to picture a thunderstorm, chances are they will have no problem slipping into a memory of dark clouds and bright flashes screaming out from them. But, incredibly, they’re probably picturing the tame version of...

If you live in the Northern Hemisphere, it's almost time for the summer solstice, the longest day of the year! But if all days have 24 hours, what does the 'longest day of the year' really mean? Join Jessi and Squeaks to find out!