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Life by the Numbers

AdultsAnimalsBiologyNature...
There are now more than 7 billion human beings on Earth, and that got me wondering: How successful are we compared to other species? I take a look at out how our numbers stack up to some other domains of life. It turns out that biomass, or what things weigh, can be more important than how many of something there are. Find out how our numbers stack up against everything from bugs to bacteria, and get ready for some mind-blowing numbers!

Why Are Some People Left-Handed?

AdultsData ScienceScienceSociety...
We've got two perfectly good hands attached to two perfectly good arms, so why do most people prefer to use one over the other for common tasks?

A brief history of melancholy

AdultsHistoryPsychologyMental Health...
If you are a living, breathing human being, chances are you have felt sad at least a few times in your life. But what exactly is melancholy, and what (if anything) should we do about it? Courtney Stephens details our still-evolving understanding of sadness -- and even makes a case for its usefulness.

3 Questions That Could Change The World from Kid President

AdultsInternet CultureSocietyHuman
Do you dare to do something awesome?

Chimamanda Adichie: The danger of a single story

AdultsEqualitySocietyCulture...
Our lives, our cultures, are composed of many overlapping stories. Novelist Chimamanda Adichie tells the story of how she found her authentic cultural voice -- and warns that if we hear only a single story about another person or country, we risk a critical misunderstanding.

Rita Pierson: Every kid needs a champion

AdultsEducationPhilosophyHuman
Rita Pierson, a teacher for 40 years, once heard a colleague say, "They don't pay me to like the kids." Her response: "Kids don't learn from people they don't like.'" A rousing call to educators to believe in their students and actually connect with them on a real, human, personal level.

When The Lion Sees Its Rescuer

AdultsAnimalsHumanRelationships...
Lions aren't that cruel. They know how to show their gratitude.

GoPro: Diver Saves Sea Turtle

AdultsAnimalsHumanNature...
Divers off the coast of Mexico save a sea turtle that became tangled in rope.

What is ALS?

AdultsHealthLifeHuman
Man Who Lost His Mother To ALS Describes What Life Is Like With The Disease

A Message to the Depressed.

AdultsMental HealthPhilosophyPsychology...
Depression is frightening but you're never alone.

Train rescue: Commuters use people power to free man trapped

AdultsSocietyTransportationAutomotive...
Scores of passengers, together with staff at Stirling station, managed to tilt the carriage so the man could free his leg which was wedged in the gap. The man was boarding a Perth-bound train at about 8:50am when he slipped and became stuck.

Always Wear Your Seat Belt

AdultsLifeTransportationFamily...
This "Embrace Life - always wear your seat belt" video shows an emotional scene where a man who is about to be involved in a car crash is being embraced by his family members.

Watch This Smart Crow Ask Human For A Drink

AdultsAnimalsHuman
Thirsty crow comes to humans for help

The luckiest unlucky man to ever live

AdultsLifeTransportationSurvival...
Most people don't escape death even once. Frane Selak has survived just about every type of vehicular accident.

How do we smell?

AdultsHumanNeuroscienceScience...
An adult human can distinguish up to 10,000 odors. You use your nose to figure out what to eat, what to buy and even when it's time to take a shower. But how do the molecules in the air get translated into smells in your brain? Rose Eveleth charts the smelly journey through your olfactory epithelium and explains why scent can be so subjective.

Bonobo builds a fire and toasts marshmallows

AdultsAnimalsNatureHuman
Kanzi the bonobo lives in America and has learnt how to build a fire, light it using matches and toast marshmallows on it. It shows just how like us some primates really are.

Jumpy

AdultsAnimalsPetsHuman...
Jumpy, a Border Collie and Blue Heeler mix, has been training with his owner Omar von Muller ever since he was a puppy. In this video, he's demonstrating the famous "Skidboot" routine.