In this historical speech, Barack Obama speaks of the greatness of the multiculturalism of the United States of America, and how it is a tool that will help us overcome all difficulties.

Now that Julia fixed the problem with the client caused by her coworker’s mistake, she has the tough job of explaining to her boss what happened. Julia is smart enough to walk the fine line between understanding her coworker’s responsibilities and also showing some empathy for her situation. Watch this video to see just how well such tricky situations can be successfully dealt with!

Why would a killer whale go after a great white shark? Enter Alisa Schulman-Janiger, a biologist who is very familiar with the different families of killer whales off the coast of California.

Freeskier Tanner Hall demonstrates how to do a cab 540.

David and Ben Crystal explain what goes into original pronunciation (OP) productions of Shakespeare and what they reveal about the history of the English language.

In the war zones of Liberia and Congo, four volunteers with Médecins Sans Frontières (MSF) struggle to provide emergency medical care under extreme conditions. With different levels of experience, each volunteer must find their own way to face the challenges, the tough choices, and the limits of their idealism.

peta2: At only 16 years old, Tia Blanco is already one of the top women surfers in the world. Learn how her vegan diet has helped Tia surf her way to the top!

Here is a short animated video about the importance of fisheries for food security, health and growth in developing countries, highlighting the commitment of the EU to helping promote sustainable management of seafood resources and inclusive opportunities for trade and growth.

WWF marine advocate Bob Zuur out at night on penguin patrol as part of the Oiled Wildlife Response team.

This original rap music video celebrates the "Java Life".
Dedicated to the developer homies everywhere who code hard day and night.
Think Java programmers meet street Hip Hop.

@TheEllenShow: How do you throw a party for Bruno Mars? You planet.
;-) Bruno Mars and Mark Ronson were on "The Ellen Show" for an incredible reenactment of the video for their unstoppable song! Everyone got in on the fun. Listen closely to captions 60 and 61: Does Bruno say "Ellie" or "L.A."? Please tell us your opinion.

Jimmy Carter interviews Bruce Willis about his third Die Hard movie Die Hard with a Vengeance. Furthermore they also discuss death and head shapes.

WWF: Long-distance swimming puts polar bears at risk of drowning due to fatigue or rough seas. Cubs are at even greater risk because their smaller body size and limited body fat leaves them more prone to hypothermia, and they don’t have the energy reserves of an adult bear.

Our friends at Numberphile provide a detailed look at how the game Connect Four is won or lost.

Jimmy Carter interviews Brad Pitt and Edward Norton about their very unusual film “Fight Club”.