Modal verbs are special verbs that go together with action verbs to indicate ability, permission, obligation and more. Let's see how they work.

As the harvest ends and the Christmas season approaches, families across the United States come together to share a lavish meal in the annual celebration known as Thanksgiving. In this video, we learn some of the crucial vocabulary used at this special time of year.

In this short scene, a deeply star-struck Sheldon meets one of his heroes, the great actor James Earl Jones, whom Sheldon knows as the voice of Darth Vader in the Star Wars movies.

Let's look at how Long Island was formed around 20,000 years ago. It has to do with a glacier that brought plenty of material along with it and left some behind when it receded.

As the series draws to a close, we have learned the one hundred most commonly used words in the English language. Maria and Spencer can relax and walk happily in the park, where nobody will bother them... or so they think!

Try to figure out what Sigrid is thinking of as she describes something. Understanding the description is just as important as guessing the answer.

Finally free from their pursuers, Maria, Spencer, and Oscar arrive at the park. It’s a lovely, sunny Saturday, the perfect day for a romantic walk.

With the car repaired, Maria and Spencer go to pick up Oscar, who has been waiting patiently for them all day... but the hungry and over-enthusiastic dog immediately finds himself in trouble.

Spencer asks Maria where she would like to take Oscar, her dog... but when they set off in his car, clouds of smoke start coming from the engine!

Both the Mississippi River and the Colorado River have a huge impact on the lives of millions of Americans. While there have been severe droughts leading to a lack of drinking water, there have also been floods because of quickly melting snow.