Watch the miraculous journey of infant sea turtles as these tiny animals run the gauntlet of predators and harsh conditions. Then in numbers see how human behavior has made their tough lives even more challenging. [Lesson by Scott Gass, directed by Johan Sonestedt and Veronica Wallenberg, narrated by Scott Gass].

While the Earth's oceans are known as five separate entities, there is really only one ocean. So, how big is it? As of 2013, it takes up 71% of the Earth, houses 99% of the biosphere, and contains some of Earth's grandest geological features. Scott Gass reminds us of the influence humans have on the ocean and the influence it has on us. [Directe...