What's that awful smell? Cat urine? Semen? Rancid butter? Possibly one of these gorgeous city trees?

Today humanity produces more than 1,400 tons of carbon every minute. To combat climate change, we need to reduce fossil fuel emissions, and draw down excess CO2 to restore the balance of greenhouse gases. Like all plants, trees consume...

It may be an impossible questions, but we can at least get close.

There's a birthday party at the fort, for one of history's most important scientists, Isaac Newton!

American chestnut trees were all over the US at the end of the 19th century until the fungus wiped most of them out. Scientists have been trying to figure out ways to bring those endangered American chestnuts back to their former glory.

How do squirrels remember their nuts? #shorts #science

The older the word, the longer (and more fascinating) the story. With roots in Old English, 'true' shares etymological ancestors with words like betroth and truce...but also with the word tree. In fact, trees have been metaphors for...

Maybe you'd like to just hear about one topic for a while. We understand. So today, let's just watch some videos about Gravity. We'll learn about why we don't fly off into space, what mass has to do with it, how does air resistance work,...

Jessi and Squeaks just spent the day hiking and sketching evergreen trees in their field journals! A lot of evergreen trees look pretty similar, but Jessi knows some fun ways to tell them apart. Join us to find out how!

Yvonne Aki-Sawyerr, mayor of Freetown, Sierra Leone, is on a mission to plant a million trees over the next two years, increasing vegetation in her city by fifty percent while shoring up eroding riverbanks and increasing biodiversity....

FEED ME! In this episode of Crash Course Kids, Sabrina has a chat with us about what living things eat to get energy. What makes something an omnivore, or a carnivore, or an herbivore? And how do plants fit in to all of this? This first...

One day, twin brothers Junajpu and Ixb'alanke discovered their father's hidden ballgame equipment and began to play. Hearing their vigorous game, the lords of the underworld sent a messenger to challenge the boys to a match. Despite the...

Rachel Sussman shows photographs of the world's oldest continuously living organisms -- from 2,000-year-old brain coral off Tobago's coast to an "underground forest" in South Africa that has lived since before the dawn of agriculture.

What does a ginkgo tree have in common with a dinosaur?

You’re in the woods, there’s a full moon, and the wind begins to howl. We can’t take you out of this horror movie scenario, but we can explain why the wind sounds so spooky.

Can you guess how tall the tallest tree is? Neither could we! Tag along with Jessi and Squeaks to learn all about the world’s tallest tree!

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

With rapidly rising global temperatures come seasonal changes. As spring comes earlier for some plant species, there are ripple effects throughout the food web. Regina Brinker explains how phenology, or the natural cycles of plants and...

Scientists are looking to end how we categorize living fossils, and in doing so, give the phrase new life.

There are animals in the fossil record that challenge some of our most basic ideas about what animals are supposed to look like. If there ever was a monster on this planet that was worthy of the name, it might have been the Tully Monster.

When you think about the impact of climate change on the circle of life, you likely picture polar bears or Bengal tigers struggling in new conditions. But the impacts on the world go all the way down to the tiniest creatures who do some...

Learn about 10 plants that could kill you in SciShow’s first List Show!

Hank takes you through the weird, twisted forests of Russia and Eastern Europe, where trees grow at odd angles. What caused trees to grow into big wooden pretzels? Was it wind? Manipulation by woodworkers? Nazis, maybe? See for yourself...

From the Avocado to Pando, we love trees! They do so much for us, from making oxygen so we can breathe, to cooling urban environments, to literally holding the ground together to prevent erosion! The SciShow team is joining