Prime Minister David Cameron will step down by October after the UK voted to leave the European Union. Mr. Cameron made the announcement in a statement outside Downing Street, in which he said he will attempt to "steady the ship" over the coming weeks and months, but that "fresh leadership" is needed.

The United Kingdom voted to leave the European Union, and it looks like it may not be an especially smooth transition. John Oliver goes over the decision on his show "Last Week Tonight."

Orcas are at the top of the food chain, but it is unprecedented that they would go after a great white shark. From the boat, whale watchers and experts alike are shocked by what they see.

This video shows us that Shakespeare invented over 2000 new words and phrases, such as "eyeball," "anchovy," and "puppy."

For the body and the mind: Try out some knee exercises and learn some new vocabulary related to posture and fitness. Enjoy!

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.

In 1066, William the Conqueror invaded Britain and brought with him fancy French words to add to the English language.

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

So if an orca attacking a shark is so rare, how do they usually behave? In this segment, we learn about how orcas around the world live and hunt.

The Magnus effect is the commonly observed deviation of the spinning ball from a linear flight path. Watch this video to find out why this occurs and what implications it has.

Some orcas do prey on sharks, but how do they do it? Researchers also have to catch sharks occasionally, and there is a particular technique that they use.

Created in 1611, The King James Bible permanently shaped the English language with new phrases that are still in use today. How many of them do you know?

Have you ever been unsure as to how elections work in the US on a federal and state level? This video explains it all.

The phenomenon of tonic immobility helps researchers study sharks, but does it also help orcas hunt and kill them?

In the 17th Century, scientific research influenced the invention of English words relating to physics, chemistry, and anatomy.