Why dogs sniff each other’s butts. It’s a somewhat silly question with a surprisingly complex answer. This behavior is just one of many interesting forms of chemical communication in the animal kingdom. [Reactions]
The video on how to get better sleep is below! Feeling tired? As our lives get busier and busier we tend to sleep less and less. So what does science say about how much you SHOULD be sleeping? [ASAPScience]
From TED Ed: 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. […]
Get an engineeer’s-eye-view of the tallest buildings in the world, to learn what challenges they face as they reach for the sky and wonder, how tall can we build? [SciShow]
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! [SciShow]
If you wan tto see how a drip coffee maker works, check out the video below! Bill describes how the household drip coffee maker evolved and how baseball popularized the machines This was originally broadcast on August 29, 2000. [engineerguy]
Suck, Squeeze, Bang, Blow: Nope, this isn’t the title of a bad adult only movie, but the simple way to explain how jet engines work. 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, […]
From Edward Current: 1. As a falling object’s path goes increasingly in the space (down) direction, it goes a little bit less in the time direction. Gravity is effectively converting some of its travel through time into travel through space. How much time converts into how much space? It works out to be 186,000 miles […]
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. This week, Reactions […]
Minute Physics explains how scientist can find exoplanets by observing distant stars. [Minute Physics]