Explore an illustrated timeline of events in geologic history—divided by geologic eras and periods—detailing the geology, transformations, and extinctions within each timeframe. (www.pbs.org)

Of all the big cats, the lion is one of the most terrifying -- but there's one man who isn't scared at all. He's Kevin Richardson, and he's dedicated his career to understanding, conserving and living alongside these majestic beasts. Join Kevin in My Lion Family as he shows you the mighty lion in a fascinating new light. (www.youtube.com)

This BBC documentary follows a young girl from rural Japan as she attempts to fulfill her dream - by becoming a geisha. (www.youtube.com)

A documentary of insect life in meadows and ponds, using incredible close-ups, slow motion, and time-lapse photography. It includes bees collecting nectar, ladybugs eating mites, snails mating, spiders wrapping their catch, a scarab beetle relentlessly pushing its ball of dung uphill, endless lines of caterpillars, an underwater spider creating an air bubble to live in, and a mosquito hatching. Written by Will Gilbert (www.imdb.com)

Homeless children are the casualties of Romania's recent history. In an effort to increase the nation's work force, former communist leader Nicolae Ceausescu outlawed contraception and abortion. Thousands of unwanted children were placed in stage orphanages, where they faced terrible conditions. With the fall of Communism, many children moved onto the streets. Some were from the orphanages. Others were runaways from impoverished families. Today there are 20 000 children living on the streets. The resources for sheltering these homeless youth are severely limited.

War Photographer is a documentary by Christian Frei about the photographer James Nachtwey. As well as telling the story of an iconic man in the field of war photography, the film addresses the broader scope of ideas common to all those involved in war journalism, as well as the issues that they cover. (www.wikipedia.org)

Arthur C. Clarke presents this unusual documentary on the mathematical discovery of the Mandelbrot Set (M-Set) in the visually spectacular world of fractal geometry. This show relates the science of the M-Set to nature in a way that seems to identify the hand of God in the design of the universe itself. Dr. Mandelbrot in 1980 discovered the infinitely complex geometrical shape called the Mandelbrot Set using a very simple equation with computers and graphics.

The cat (Felis catus), also known as the domestic cat or housecat to distinguish it from other felines and felids, is a small, furry, domesticated, carnivorous mammal that is valued by humans for its companionship and for its ability to hunt vermin and household pests. Cats have been associated with humans for at least 9,500 years, and are currently the most popular pet in the world. Owing to their close association with humans, cats are now found almost everywhere in the world. (www.youtube.com)

Life In A Day is a historic film capturing for future generations what it was like to be alive on the 24th of July, 2010. Executive produced by Ridley Scott and directed by Kevin Macdonald (www.youtube.com)

Extreme Deep Underwater Caves Diving - one of the most dangerous activities in the world Full Documentary (www.youtube.com)

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