In a TEDx Talk, brain researcher Dr. Lara Boyd talks about neuroplasticity, how we learn, and how short-term and long-term memory work.

Lara Boyd talks further about behavior bringing about changes to the brain, and about why it's so hard to recover after a stroke.

Lara Boyd concludes her fascinating talk on the brain, explaining how personalized medicine and biomarkers can apply, not just to recovery from stroke and cancer treatment, but to teaching and learning in everyday life.

John visits the Alice in Wonderland sculpture in Manhattan's Central Park, where he ponders the meaning of Lewis Carroll’s curious and imaginative literary work.

In the middle of Manhattan, there is an ancient Egyptian monument with carved hieroglyphics. John informs us of its vital statistics and lasting significance.

The actor Leonard Nimoy from the famed TV and film series Star Trek lets you see his “human side” in this vintage interview with Jimmy Carter.

A 14-year-old Natalie Portman talks with David Letterman and Alec Baldwin about starring in R-rated movies and getting straight As in high school.

Movie star and straight A student Natalie Portman has homework to do just like any other schoolgirl, and reveals that she sometimes finds herself in the same kind of trouble as a normal teenager.

Here's the trailer for an inspiring film about the efforts of ordinary people to make the world a more sustainable place. Experts talk about the necessity of taking action.

See LMFAO tear up Cancun with their song “I’m in Miami Bitch” and a hilarious acoustic version of… whateva!

Lauren shows us around Brick Lane in East London. Sights include a mosque, street art, and hopping nightclubs.

Londoners interviewed at Borough Market describe the great variety of thriving cultures – with an emphasis on cuisine – in their city.

This is a short video showing some of London's best-known sights, such as Trafalgar Square, Tower Bridge, and the Tate Modern.

London's West End is the focal point for this video, and the narrator has some good tips on buying discounted movie and theater tickets.

This video provides some helpful advice on getting around London, including pointers on cabs, double-decker buses, and the Underground.