Green sea turtles (the largest hard-shelled sea turtle) and whale sharks (the largest shark and fish overall) are featured in this segment. We also encounter a langouste, otherwise known as a rock lobster, and a moray eel lurking in their coral reef habitat.

We learn about the thousands of kilometers that humpback whales travel from their summer habitat in the polar regions to the tropical or subtropical waters where they spend the winter. Their multi-versed songs and the markings on their flukes are also discussed.

Marine mammals are the focus of this segment on coastal sea life. Humpback whales mostly swim along the coasts, whether in the Northern or Southern Hemisphere. Seals are semi-aquatic and try to stay as close to the coast as possible, though they'll search for prey in depths of up to forty meters.

California sea lion communication, mating habits, and past and present threats to their survival are discussed. This segment additionally features amazing aerial photography of their rocky coastal habitats.

The video starts with information about coastal geology and the evolution of birds. It includes amazing footage of white storks, wildebeest, as well as zebras in East Africa's Serengeti region.

The focus of this segment is on animals of the African savanna. We get to see giraffes and elephants, the largest of the land creatures, as well as cheetahs, the fastest.

Rhinoceroses, or rhinos for short, are the largest land animals after elephants. Five species remain (two in Africa and three in Asia) and all are endangered as a consequence of the illicit trade of their horns. The importance of rivers is another focus of this segment.

The series draws to a close with footage of apes, the most direct ancestors of humans. The narrator nicely sums up the meaning of evolution and man's place in nature.

The city of Oxford is home to some 150,000 residents and a famous seat of learning, the oldest English-speaking university in the world. Although the exact date of its founding isn't known, it is said that local priests and monks were first taught in monastery schools in the area in the eleventh century.

Here are some verbs that are handy when plans change. This segment features "to postpone," "to delay," "to procrastinate," and "to put off."

Here is one more verb to use when you want to avoid giving an answer: "to stall." Sigrid then sums up and gives you some tips for remembering all of the related verbs from both segments of this video.

Now we'll look at some verbs and phrasal verbs that use imagery to talk about plans and timetables that change. This segment is about "to shelve," "to put on ice," "to put on hold," and "to hold off."

This final segment is about two fun expressions: "to kick the can down the road" and the currently popular expression, "Delay, delay, delay." Then Sigrid sums up parts 3 and 4.

Lauren, with the help of Matthew as a model, goes through both the singular and plural forms of body parts, along with how to use them in sentences.

Why is it in English that eggplant has no egg in it, nor is there any ham in hamburger? Similarly, quicksand isn't quick at all and pineapple contains neither bits of pine nor apple? In this clip, Lauren has fun with her native language and points out a few of its amusing quirks and contradictions. Enjoy!