Nature

When Mount Nyiragongo erupted in the Democratic Republic of Congo in January 2002 it seemed like a disaster. Molten lava plunged down the hillside and poured into nearby Lake Kivu. Many died, and much of the city of Goma was destroyed. In fact, the local people were lucky. Had the eruption spread to one of the many volcanic faults under Lake Kivu, it could have unleashed one of the most terrifying of all natural phenomena - lake overturn.

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)

Imagine sea levels rising to over 70 metres... Eminent climatologists think another Great Flood is inevitable if current CO2 emissions continue. Based on research by NASA astro-biologist and paleontologist Professor Peter Ward and a group of respected American climatologists, Earth Under Water is an eye-opening documentary uses scientific evidence past and present, archive footage, location photography and CGI to explore the terrifying consequences should the atmosphere's CO2 levels treble over the next 100 to 300 years, as predicted.

Sunrise earth Moose in the morning Full HD movie

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)

The sound of the cuckoo is to many the very essence of spring, yet behind the magical call is a bird that is a cheat, a thief and a killer. Just how does the cuckoo trick other birds into accepting its eggs and raising its young? Why don't the duped foster parents react as they watch the baby cuckoo destroy their own eggs and chicks? And why do they work so relentlessly to feed a demanding chick that looks nothing like them and will soon dwarf them?

Successful lions need to be brutal and use any means to quash would-be kings. These are not random acts of violence, but vital behaviour to secure their own genetic future. (www.youtube.com)

Mysteriously beautiful fractals are shaking up the world of mathematics and deepening our understanding of nature.

A fractal is "a rough or fragmented geometric shape that can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole," a property called self-similarity.

For Centuries. wolves have been characterized as bloodthirsty beasts and the bane of helpless livestock. determined to overcome this misconception, filmakers Jamie and Jim Dutcher-creators of the Emmy Award Winning Wolves at Our Door, spean six years in a tented camp in the wilderness of Idaho-living with a pack of wolves! (www.youtube.com)

PBS Nova documentary on the 2011 tornado outbreak. (www.youtube.com)