Prince Harry recorded a video message to be broadcast during the Change Live concert at Twickenham. CHIME FOR CHANGE, founded by Gucci, is a new global campaign to raise funds and awareness for girls' and women's empowerment. It aims to convene, unite and strengthen the voices speaking out for girls and women around the world, with a focus on three key areas: Education, Health and Justice.

San Francisco is a very unique place in terms of its layout, architecture, population, and landmarks. Enjoy this quick tour of the very hilly city!

Sigrid explains what a limerick is, and how to write one. If you are so inclined, you can submit your limericks in the "comments" section of the video tab.

Here you can view part two of Donald Trump's acceptance speech after being elected the 45th US president.

Career expert Nicole Williams explains the most important question in an interview and the kind of answer the interviewer is looking for.

Many secrets remain surrounding the creation of Stonehenge. Archaeologists try to unravel the mystery.

On this second clip from Faithless band members, Sister Bliss and Maxi Jazz, they discuss ‘Comin Around’, a song recorded in collaboration with Temper Trap. It speaks to the issue of dealing with the challenge of personal relationships that fail.

Check out born and bred Maui riders Kai Lenny, Shawn Richman and Jesse Richman showing off their kiteboarding skills and talking about what makes Maui the perfect place.

"D" is a voiced consonant that sounds a bit different depending on its context in a word or sentence.

Theater director Simon Stone deconstructs some of the common visual and audio tricks of modern theater, utilizing a cast of first-time volunteer actors recruited in the days prior to TEDxSydney 2011 and rehearsed just once.

Auckland is the biggest city in New Zealand and boasts a cosmopolitan blend of European, Maori, Asian and Polynesian cultures, as well as a natural environment that encourages visitors to embrace the great outdoors.

Professional kiter Hope Levin explains a few tricks for kiteboarding with more style.

American TV show Entertainment Tonight reports on the latest news between American singer and actress Selena Gomez, and Canadian singer-songwriter, actor and producer The Weeknd with an eyewitness account of their Italian getaway.

They may be too young to vote, but they certainly are curious. Barack and Michelle Obama answer some more questions from their very young constituents.

Barack and Michelle Obama take on some tough questions from very young constituents.