The salmon that make it upstream mate and then die of exhaustion. Meanwhile, many other animals are lurking and waiting to feed.

Robin's routine enchants the crowd, but will it impress the judges enough for her to take home the gold medal?

British pop group One Direction performs an acoustic rendition of their song "Night Changes." Enjoy!

Barney explains the magic of February thirteenth, or as he calls it, "Desperation Day."

The White Stripes come from Detroit, Michigan and are known for their particular brand of garage rock. The song "Seven Nation Army" topped charts in multiple countries after it was released on the album "Elephant."

Romantic chemistry is all about warm, gooey feelings that gush from the deepest depths of the heart... right? Not quite. Actually, the real boss behind attraction is your brain, which runs through a very quick, very complex series of calculations when assessing a potential partner. Dawn Maslar explores how our five senses contribute to this mating game, citing some pretty wild studies along the way.

Rihanna gets very cozy with Drake in this duet, which reached number one on the Billboard Hot 100.

Super Bowl results: The Denver defense sacked Panthers quarterback Cam Newton seven times over the course of the game, which ended in their favor 24-10.

In this final installment of the series, a white Kermode bear encounters a black bear while fishing. Observe their behavior. Look and see for yourself what ensues!

American country music singer-songwriter Dolly Parton performs "Jolene" at Glastonbury 2014, a song released in 1973 that has been recorded by many different artists over the years.

Meghan Trainor does a dynamic performance of her hit "Lips are movin'" on The Today Show. Enjoy!

The Superbowl was full of impressive performances this year, and not just from the players! Beyoncé, Coldplay, Bruno Mars, and Lady Gaga all made appearances as musical guest stars.

Penny tries to patch things up between Leonard and Sheldon when they are having a fight, but ends up making things worse!

The first single to be taken from Coldplay's upcoming new album, A Head Full Of Dreams (out now).

What happened when Expedition PROTECT and American Promise arrived at Jeffrey's Ledge, a marine protected area in the Gulf of Maine? The crew tells us about what they are doing and why.