Topic: dirt

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40,000 years of London history created with papercraft

Peel back the pavement of a grand old city like London and you can find just about anything, from a first-century Roman fresco to a pair of medieval ice skates—even an elephant’s tooth. As one of Europe’s oldest capit...

Harvesting carrots with ski lift-style ‘toplift’ machines

Watch organic carrots rise from the dirt and swing from the conveyor belt of a Dewulf carrot toplift harvester. Chop, chop, chop to their tops before they ride up an elevator for collection in crates. This machine dem...

How do living things change their environments?

Think about your day, from when you wake up, to where you spend your day, to your bedtime routine at night. Crash Course Kids asks, "What pieces of it are a result of human intervention? Where did these pieces come fr...

Why is biodiversity so important? – TED Ed

Biodiversity, short for biological diversity, is the term we use for the variety of animals, plants, fungi, bacteria, and other intertwined life forms within any ecosystem... "from towering redwood trees to tiny, sing...

Deep in the caves with Homo Naledi & the Rising Star Expedition

More than 1,500 individual bones and teeth of at least 15 skeletons of Homo naledi were excavated by an all-woman "underground astronaut" team during the 2013/14 Rising Star Expedition. Homo naledi is a new species in...

Rachel Atherton’s downhill mountain biking victory at Vallnord

Attack the fast, twisty, often steep, jump-filled, rock and root riddled track at the 2015 UCI MTB World Championships in Vallnord, Andorra with British downhill mountain bike champion Rachel Atherton. Her World Champ...

Why do Leafcutter Ants cut leaves and carry them away?

Where are the Leafcutter Ants carrying all those leaves to? They do drink the leaf sap, but they don't eat them, so what are the leaves for? File under composting and farming: It's all about growing a highly nutritiou...

Beam Drop Inhotim, 2008, Brazil – Chris Burden

A large space in the dirt is cleared, a pit is dug and filled with wet concrete, and a huge crane lifts and drops 100 locally sourced steel I-beams into the pit. This is the work of late American artist Chris Burden f...

LeVar Burton visits the Grand Canyon – Reading Rainbow

Take a video field trip to the Grand Canyon with LeVar Burton and Reading Rainbow as he explores the canyon's history, early inhabitants, and its original formation. The views are incredible from a boat on the Colorad...

Transplanting pansies with a highly efficient gardening robot

So smooth, seemingly gentle, and ridiculously time efficient, the transplanting pack planter robot in this Bob's Market and Greenhouses video moves crowded plants from smaller containers to much larger ones. On deck: ...

Seed germination to growth time lapses by Neil Bromhall

To see the unseen through technology is one of our favorite things, so we love watching Neil Bromhall's beautifully scored plant growth time lapse videos. Above, a compilation of germination to growth footage. Seeds i...

From seed to sapling – Time lapse of an oak tree

Over the course of eight months, Neil Bromhall filmed a sprouting acorn, one that he would eventually plant as an oak tree sapling in his garden: The acorn was collected in September and filmed in an underground s...

What makes that fresh rain smell? MIT films rain drops to find out

Why do we smell that fresh earthy scent before and/or after it rains? With high-speed cameras, MIT researchers have filmed rain drops, and believe that the footage explains petrichor, the "pleasant smell that frequent...

Deep Look: The Hidden Perils of Permafrost

When you put a permafrost core in a CT scanner and analyze the data, you're traveling back in time to answer important questions: What was buried deep within the frozen soil? How much of it is ice or plant matter? How...

Dead stuff – The secret ingredient in our food chain

When you picture the lowest levels of the food chain, you might imagine herbivores happily munching on lush, living green plants. But this idyllic image leaves out a huge (and slightly less appetizing) source of nouri...

Why Do Rivers Curve? – MinuteEarth

"...All it takes to turn a straight stretch of river into a bendy one, is a little disturbance and a lot of time, and in nature there's plenty of both." In this Minute Earth episode, narrated by science writer Emily E...

How do cliff swallows build their mud pellet nests?

From the Cornell Lab of Ornithology, watch as some cliff swallows gather small chunks of mud from the water's edge, and then, against a cliffside or man-made wall, stack the mud pellets around themselves like 1,000 dr...

Cauliflower: How Does it Grow?

Five million heads of cauliflower grow every year at Lakeside Organic Gardens, a family-owned farm in Watsonville, California. These flower bunches are full of vitamin C, fiber, and antioxidants... and they change fro...

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