They can flow like a liquid and bounce back like a solid. Masses of fire ants show a duality that intrigues physicists.

Here's the video of the song "Marry Me" by American recording artist Jason Derulo. The performance also features Jordin Sparks, to whom the song was dedicated.

Drake is a Canadian rapper, songwriter, and producer. "One Dance" features British singer Kyla and Nigerian recording artist Wizkid.

"Am I Wrong" is a song by the Norwegian musical duo Nico & Vinz about thinking out of the box and believing in dreams.

Mickey and Donald try to help a hapless Goofy woo the love of his life, but don't realize that love is not always what it seems.

Sigrid uses common household objects to explain two ways to pronounce the letter A.

The official promo video for the Rolling Stones' "Start Me Up" was directed by Michael Lindsay-Hogg. This number one hit was written by Jagger/ Richards, produced by the Glimmer Twins, and performed by Mick Jagger on lead vocals, Keith Richards and Ronnie Wood on guitars, Charlie Watts on drums and Bill Wyman on bass.

Career expert Nicole Williams gives us some simple but useful tips for making a good first impression at a job interview.

"Everything at Once" is a song written and recorded by Australian singer Lenka.

It's "If You're Happy And You Know It" made Super Simple! Practice the emotions happy, angry, scared, and sleepy with this super fun song for kids.

Sigrid explains a third way to pronounce the letter "A." For the first two ways, see Sigrid explains: the letter A - Part 1 of 4.

"Shape of You" is a hit single from Ed Sheeran's album Divide and has gone on to win a Grammy and to be considered one the most successful songs of all time. A fun fact is that the song had originally been written with Rihanna in mind, but in the end, Ed Sheeran kept it for himself.

Ed Sheeran gives us this exclusive, FIRST EVER live performance of "Castle on the Hill" live for the BBC Radio 1 Breakfast Show!

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

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.