July 29, 2008 • 1h
They are one of evolution's most useful and prevalent inventions. Ninety five percent of living species are equipped with eyes and...Read more
August 5, 2008 • 1h
It doesn't just take willpower to survive. It takes guts--in the form of a digestive system that turns food into fuel. Look closel...Read more
August 12, 2008 • 1h
It's one of the most important developments in the history of life. An adaptation that lets animals kill, butcher, and devour. The...Read more
August 19, 2008 • 1h
In the history of life on earth, sex may be the ultimate survival skill, because the bottom line is: reproduce or die. This episod...Read more
August 26, 2008 • 1h
It makes up 16% of your body weight, is the largest organ in the human body, allows birds to fly, mammals to nurse their young, an...Read more
September 2, 2008 • 1h
Humans have always been fascinated with the one part of the world that we could not conquer - the sky. How did the earth's first f...Read more
September 14, 2008 • 1h
How has our ability to communicate defined us as a species? Sharing information with each other has allowed humans to rise to the ...Read more
September 21, 2008 • 1h
Life has evolved into a multitude of sizes. Over the course of three billion years, life has taken on many forms--from an .02-micr...Read more
September 28, 2008 • 1h
The deadliest natural weapon employed in the animal kingdom, venom has independently evolved in creatures as diverse as jellyfish,...Read more
October 6, 2008 • 1h
Living organisms have entered into a battle for survival for hundreds of millions of years and the pressure to survive has resulte...Read more
October 13, 2008 • 1h
The ability to react and move can often mean the difference between life and death in the animal kingdom. Some animals have evolve...Read more
January 1, 1970 • 1h
Episode 12 of Season 1 premiered on January 1, 1970
January 1, 1970 • 1h
Episode 13 of Season 1 premiered on January 1, 1970