Global forest network cracks the case of tropical biodiversity

So the big question here is why are there so many species in the tropics? The flipside of that is why are there so few species relative to the tropics in the temperate zone? So we’re at Washington University’s Tyson Research Center located about 25 minutes outside of St. Louis and just on the edge […]

Hey Bill Nye, ‘How Do Greenhouse Gases Trap Photons in Our Atmosphere’? #TuesdaysWithBill

Hello Mr. Nye. Happy Tuesday. My name is Billy. I’m a big fan and I have a question about climate change. If the photons from the sun are trapped in our atmosphere by our greenhouse gases then how come those same greenhouse gases don’t block photons from the sun from ever entering our atmosphere? Is […]

Empress Tree – Paulownia tomentosa – How to grow Royal Empress Tree

This is the empress tree. Paulownia tomentosa. An important bridge, culturally and economically, between our culture and that of Japan. The empress tree is a native of Japan and far eastern China. But there is a pathogen affecting whole stands of this tree in its native range. The main horticultural interest for this tree for […]

Invasion curve animation Biosecurity Council of WA | Department of Agriculture and Food WA

Every West Australian can help protect our State from pest and disease threats that impact on businesses, industry, the economy, the environment and our lifestyle. Western Australia has an enviable biosecurity status, free from many of the world’s worst pests and diseases – a reputation that opens doors to opportunities, especially trade. This reputation is […]

Investigating the Trees of Amazonia

– Tree #83. I don’t know… – Other… – This one? – The other. – Cut. [laughs] – So try to smell. – Oh, it smells spicy! – Yeah. – Yeah. – Yeah, so the nutmeg family, mace. – It smells really good. – Yeah, no, this is a good one. And it’s also in […]

Training Trees

Let’s talk tree basics. An evolutionary phylogenetic tree is a depiction of how different species are related to each other. We’ll start with just one branch, which represents a single species. Like cushion sea stars… or… human beings. The top of that branch contains all the individual organisms of that species. So, all people. Or […]

A Real Alien Invasion Is Coming to a Palm Tree Near You | Deep Look

Aah, Southern California. Y’know, the whole “surf’s up, Tinseltown, sun-soaked glamour” thing? Too bad this idyllic landscape is mostly make-believe. Take the palm trees. They’re not even real trees. They’re more closely related to grass. And they’re imported. Like this Canary Island date palm. It came halfway around the world to be one of the […]

How Many Trees Are There?

[MUSIC] This episode is brought to you by Squarespace. [MUSIC] The world’s tallest tree reaches 380 feet into the sky. One giant sequoia is made of enough wood to fill a 747. One baobab tree in South Africa is so wide that they put a pub inside it. These enormous trees might be rooted in […]

Phylogeny and the Tree of Life

Hey it’s Professor Dave, I wanna tell you about the tree of life. By now we know a lot about natural selection and the ways that populations of organisms can change dramatically over long periods of time, just like slow geological processes that create mountains and canyons. Over the half-billion years since the Cambrian explosion, […]

Your Place in the Primate Family Tree

Hey there, Kallie here to remind you that Eons has some cool stickers for sale over at, link in the description. Thanks for watching and, on with the show. Would you recognize your earliest primate ancestor if you met it face to face? What if it didn’t look like a monkey, or an ape, […]