Showing posts tagged
#science

Science: Why Do Dogs Smell Each Other’s Butts? [Reactions]

We are getting to the bottom of one of the biggest quandaries in science: Why dogs sniff each other’s butts. Turns out this behavior is just one of many interesting forms of chemical communication in the animal kingdom.

Dogs use a special feature called the Jacobsen’s Organ to get chemical signals from their nose sent directly to their brain.

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What is Alzheimer’s Disease?

Alzheimer’s disease is the most common cause of dementia, affecting over 40 million people worldwide. And though it was discovered over a century ago, scientists are still grappling for a cure.

Ivan Seah Yu Jun describes how Alzheimer’s affects the brain, shedding light on the different stages of this complicated, destructive disease.

Watch the full lesson here.

Science: Why Do Birds Have White And Dark Meat? (And Do We?)

Why do chickens and turkeys have white meat and dark meat? And, like, gross, but .. do humans have the same thing? It’s all about our muscles: what they’re made of, and what they’re made for. Quick Questions has the answers!

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How Does a Jet Engine Work? [GE Masterclass]

Baratunde Thurston takes you behind the scenes at GE’s Global Research Center to answer the question: How does a jet engine work?

With the help of aerospace engineer Todd Wetzel, you’ll see why “suck, squeeze, bang, blow” is a great way to talk about modern flight.

From turbojets to turbofans, the two discuss how airplane engines have evolved to become the powerful, high-efficiency machines they are today.

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How Does Tylenol Work? The Truth Is, We Don’t Know… [Reactions]

Acetaminophen, the active ingredient in Tylenol™, is one of the most popular pain relievers in the world, selling more than 27 billion doses in 2009 alone.

It can reduce fevers, eliminate aches and pains and relieve cough and cold symptoms. But how does it work? The truth is, no one knows exactly. On this episode, Reactions examines the theories about the popular pill.

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Tylenol is a registered trademark of McNeil Consumer Healthcare.

Science: What Makes Tattoos Permanent?

The earliest recorded tattoo was found on a Peruvian mummy in 6,000 BC. That’s some old ink! And considering humans lose roughly 40,000 skin cells per hour, how do these markings last?

Claudia Aguirre details the different methods, machines and macrophages (you’ll see) that go into making tattoos stand the test of time.

View full lesson here.

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