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Topic: science
The Pink Iguana of Galapagos
One of Galapagos’ most recently described species is also one of its genetically oldest. Pink iguanas are not just a different colour from other land iguanas; they are a completely separate species. There are only aro...
Conductive copper dominoes topple to turn on this lamp
Why simply flip a switch when you can turn on a lamp with a domino chain reaction instead? This is a copper domino light created by London-based design studio Glithero. Tip over the first conductive copper switch, the...
Sounds of Survival: The quest to record an exquisite spike-thumb frog mating call
Deep in the emerald cloud forests of Cusuco National Park of Honduras, scientists are on a quest to record the never-before-heard call of the endangered “exquisite spike-thumb frog” (Plectrohyla exquisita). This charm...
Where Do Teeth Come From?
How long teeth can last? 30,000 years? 200,000 years? 300 million years? In this episode of It's Okay to Be Smart, Joe Hanson gets an up-close look at some ancient saber-toothed tiger (smilodon), mastodon, tyrannosaur...
How does sound travel to our brains?
How does a sound, like music played on a trumpet, travel from the source through our ears and to our brains? This animated video from the National Institute on Deafness and Other Communication Disorders describes the ...
Planet-changing ‘invisible’ microbes on the deep sea floor
"We're making progress at a rate that's outpacing the textbooks. We can't write textbooks fast enough to cover all of the really fundamental discoveries that are happening in the field of microbial ecology right now.....
The ‘Swiss Army knife’ legs of a house centipede
So. Many. Legs. Thirty legs arranged in a fluttery burst-like arrangement. This is the Scutigera coleoptrata, a house centipede. And though some may think they're creepy or gross, or dangerous to humans (they're not),...
Is climate change making hurricanes worse?
"So the important thing to understand about hurricanes is that they only form over warm water. Think of warm water as a fuel to the engine that is a hurricane. The hurricane forms when warm air over the ocean rises. A...
Why do goats have rectangular pupils?
In this 'I Wonder Why' episode from World by Charlie, Casey Engelman wants to know why goats have rectangular pupils. Her brother and host Charlie Engelman didn't know either, so they did some research. Those hori...
How do garden eels eat?
Alexandra Khrizman and colleagues at the Hebrew University of Jerusalem and Tel Aviv University made more than 100 dives and planted cameras among garden eels to determine how they handle currents, and whether being s...
Raindrops: What do they really look like?
When you draw raindrops, how do you draw them? Are they tear-shaped with the point at their tops? Is that really what raindrops look like? Dr. Joe Hanson asked that very question. He then tested what happened to water...
Cooling without polluting: Two new green air conditioning innovations
The starry night sky seems remarkably distant from the topic of air conditioning, but it’s revolutionizing the field in quite an unexpected way. In this episode of "The Spark," watch how scientists from across the glo...
Hawk moths and The Art of Staying Stable
Like a hummingbird or a creature from a Hayao Miyazaki film, hawk moths or Sphingidae, are a family of large insects with the magical-looking mastery of hovering in midair. They can also fly backward and keep incredib...
How to make a rocket
"What's the best scientific formula for a powerful rocket with oxidizer and fuel?" In this video clip from Bang Goes The Theory Series 5, via BBC Earth Lab, we get a quick peek at the mix of chemistry and physics that...
Four levels of chocolate chip cookies: From amateur to food scientist
Learn a few professional tips of what to do (and maybe what not to do) when baking this classic: Chocolate chip cookies. Amateur baker Alina, home cook Lorenzo, and Penny, a professional chef, demonstrate how they mak...
Which life form really dominates Earth?
In 2018, there are around 7.6 billion people on the planet, but weigh us all together on a giant scale and we only make up 1/10,000 of Earth’s biomass. What is biomass? And what life forms dominate the rest of the pla...
Hydrophytes, 4D-printed aquatic ‘plants’ for the future
Tentacles wiggle. Filaments expand. Tails spiral. Looking like coral polyps, sea pens, crustaceans, and other colorful aquatic lifeforms, these multi-material 3D printed 'plants' come alive. Triggered by air that's pu...
The Ocean Cleanup technology and challenges explained
The Great Pacific garbage patch in the northern Pacific ocean holds an estimated 1.8 trillion hard-to-see pieces of plastic that float around on or just below the water's surface. They're kept swirling in an area that...
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