Yimi, a tour guide in training in the Colombian Pacific, gives us an up-close and personal look at the area's humpback whales, also known as the yubarta.

Meet Paulino from Paraíso in the Dominican Republic, who gives an inside look into the homes, food, education and lifestyle of his community's locals.

Italian thinker and educational psychologist, Francesco Tonucci, holds a meeting in Seville to ask students to provide feedback about what would constitute an ideal school. Tonucci believes strongly that it is the responsibility of the teachers and educational institutions not only to ask but to try to implement students' suggestions.

Animal protective services calculate that fifty thousand greyhounds are abandoned annually in Spain, and it's not just greyhounds. In fact, Spain's animal abandonment statistic of four hundred pets per day put it at the top per inhabitant per year out of the entire European Union.

The Ideas Club gives us an idea about the processes of caramelization vs. carbonization of sugar while cooking.

This finale to the series reiterates the extent to which "bargains" are a relative concept and can be found even on luxury items in Spain's thriving second-hand market.

Jésus Lopez, a Spanish veterinarian specializing in wildlife, explains his passion for as well as some challenges of his profession.

Thanks to Spain's second-hand market, many who could not previously afford such luxury items as boats can now have access to them.

Our tour guide takes us on a search for blue anoles, a highly endangered species of lizard found only on Gorgona Island.

Jesus Lopez shows us the facilities of the "Centro de Recuperación de la Fauna Salvaje" [Wild Fauna Recovery Center] from the Intensive Care Unit to the kitchen.

Rafa Ibañez's computer program, "Libertexto," allows for many text-related tasks to be done on-screen rather than by hand.

Sergio from Monterrey, Mexico, tells us about Mexico's great variety of amber as well as some of the ins and outs of the amber business.

Some "second-hand" clothing is actually not "second-hand" at all- but rather donated with the labels intact out of the goodness of some donors' hearts. Learn about this and other aspects of Spain's thriving second-hand clothing industry.

Today is an important day in the Sevillian town of Albaida de Aljarafe as it is holding its first dog show/contest specifically for pure Spanish Greyhounds, a breed that has been somewhat endangered recently due to crossbreeding with English Greyhounds.

In addition to saving people a lot of money, buying clothing second-hand has become increasingly fashionable. From ski clothes, to military clothes to vintage and baby fashions, everything can be bought second-hand.