TOEFL: A short history on the development and the importance of the periodic table.
TOEFL: A discussion on how loneliness affects depression, and how loneliness can be measured by sleep patterns.
TOEFL: A clip describing a study that shows how even young children show tribal instincts.
Marily Oppezzo explains how walking could help you be more creative.
A marine biologist shares why she wants to turn the legendary sea creatures into heroes of the oceans.
Using modern technology, Mike Gil and his colleagues explore how coral reef fish behave, socialize and affect their ecosystems.
TOEFL: A discussion on the effects of the asteroid event that caused the extinction of the dinosaurs.
TOEFL: New research is looking into how plants can be used to generate electricity and produce artificial light.
TOEFL: Why did the most abundant bird in the world go extinct in just 50 years?
A short video showing a Portuguese man o' war hunting, killing and eating a small fish.
TOEFL: Scientist have discovered a supernova that is behaving in an unusual way.
TOEFL: The second clip about how English became the dominant world language and the (unfair) advantages it gives its speakers.
TOEFL: The first clip about how English became the dominant world language and the (unfair) advantages
it gives its speakers.
A description of the advantages and disadvantages of the whole world becoming vegetarian.
Ric Elias had a front-row seat on Flight 1549, the plane that crash-landed in the Hudson River in New York in January 2009. He describes what went through his mind as it happened.
In this short talk, Moshe Safdie surveys a range of projects that do away with the high-rise and let light permeate into densely-packed cities.
Jay Walker explains why two billion people around the world are trying to learn English.
After hitting on a brilliant new life plan, our first instinct is to tell someone, but Derek Sivers says it's better to keep your goals secret.
Aziz Abu Sarah is a Palestinian activist with an unusual approach to peace-keeping: be a tourist.
Graham Hill discusses if having less stuff can lead to more happiness.
Is there something you've always meant to do, wanted to do, but just haven't? Matt Cutts suggests: Try it for 30 days!
Nestlé (the coffee company) explains the orgins, history and varieties of coffee.
Adam Ostrow asks a big question: What happens to that personality after you've died? Could it ... live on?
TOEFL: A clip about how effective brain training apps are at making you smarter.
A Giant Pacific Octopus, perhaps the smartest of all invertebrates, steals crabs from a fisherman.
TOEFL: Two professors offer contrasting opinions on recent research concerning how genetics affects a person's intelligence.
A pair of wolves chases and captures caribou on the northern plains of Canada.
A drongo bird tricks a group of meerkats to get food.
TOEFL: A professor talks about the science of pain.
TOEFL: A professor talks about the evolution of three different types of dog intelligence.
TOEFL: Professor Roll Vertigal answer whether a phone get heavier when you load music on to it.
TOEFL: Author Douglas Preston describes the discovery of an ancient lost city in Honduras - the Lost City of the Monkey God.
A BBC video about a honey badger that can escape from any cage.
TOEFL: New Zealand starts a gene drive to remove all of the predators from the country.
TOEFL: A lecture on a condition called misophonia which makes people sensitive to annoying sounds.
IELTS: A short lecture on the history of the Mongol Empire.