DocuWatch on Facebook
Art America Britain History Science Societies War Shop
DocuWatch

Miracle Planet
Miracle Planet 01 - The Violent Past
Miracle Planet 02 - Snow Ball Earth
Miracle Planet 03 - New Frontiers
Miracle Planet 04 - Extinction and Rebirth
Miracle Planet 05 - Survival Of The Fittest

« Men Of Rock

Planet Earth - The Living Machine »

Description

Miracle Planet
Episode One

 The Violent Past

Earth was born as a result of repeated asteroid collisions, the moon created by a single giant impact event. Then, Earth's size attracted huge meteorites, which slammed into it, causing super-high-temperature rock vapour to cover the entire surface and evaporate all ocean water. The earliest life-forms survived such infernal events by escaping deep into the ground, miraculously emerging again and again. The Earth has gone through innumerable catastrophic events, and life has survived by acquiring new abilities to live through each crisis. Humans are part of the grand history of life's evolution, which has been closely intertwined with repeated cataclysmic events. Why was Earth able to evolve into a liveable planet, but not Mars, which failed to hold its atmosphere and oceans? Find out in the opening episode of the series.

Episode Two

Snow Ball Earth

The hypothesis "Snowball Earth" explains that ice ages, caused by the earliest life-forms, resulted in an evolutional leap ? larger-sized life. Atmospheric methane created by microbes initially kept the Earth warm. As microbes that produce oxygen (photosynthesizers) emerged, atmospheric methane was lowered. As a result Earth cooled and the primeval ocean froze to 1,000 meters deep. Most life may have become extinct during a long period of intense glaciation believed to have lasted several million years. However, some life survived, perhaps in puddles created near volcanic craters. Carbon dioxide accumulated in the air because thick ice sheets prevented ocean water from absorbing it. A green-house effect, created by carbon dioxide, finally melted the ice and fed photosynthesizers. Hyper hurricanes raged after the great meltdown and stirred up the ocean water, creating an ideal condition for life to prosper and develop collagen. Using collagen, life-forms were able to build larger bodies, and a variety of creatures, called Ediacara biota, emerged for the first time.

Episode Three

New Frontiers

New Frontiers tells the story of how "continental drift" brought our ancestors onto the land. Four hundred million years ago, shallow seas around primeval continents were home to most life-forms. The size of the shallow seas decreased as the supercontinents, like Laurasia formed. Some species found freshwater homes inland to escape from a struggle for survival in the ocean. Continental drift caused the formation of huge mountains. The peaks blocked atmospheric currents, creating clouds that rain. The rain gathered to make rivers at the foot of the mountains. Our ancestor, Eustenopteron, came to live in those rivers at the foot of the Caledonian mountains, where primeval trees called Archaeopteris developed a mild and stable environment. The leaves of Archaeopteris supplied nutrients for life, but caused oxygen depletion during dry seasons. Eustenopteron and other fish species developed proto-lungs to survive in low oxygen. Huge predators appeared as well. Acanthostega sought to hide from predators in Archaeopteris branches that piled in water near riverbanks. They made their way forward by pushing the branches aside, thus developing a forefoot. After several million years, Pederpes finally made the first step onto the land.

Episode Four

Extinction and Rebirth

Life on Earth has experienced five great extinctions. The worst occurred about 250 million years ago during the Permian period. Our ancestors at that time were mammal-like reptiles. The super-plume theory attempts to explain this extinction with a gigantic vertical flow of magma in Earth's mantle. About 300 million years ago, under the ocean trenches around the supercontinent Pangea, the end parts of the ocean plates dropped toward the core, creating a reactionary upward magmatic current that caused violent volcanic eruptions. A huge basaltic plateau in Siberia is believed to be evidence of this super-plume. According to the theory, carbon dioxide from volcanoes warmed Earth, causing methane-hydrate long frozen under the ocean floor to melt. Enormous amounts of methane were released into the air, accelerating global warming. The methane also depleted atmospheric oxygen, devastating plants. The oxygen depletion continued for about 100 million years. Reptiles adapted best by developing a unique air-sac system. Mammals were also forced to devise a way to adapt, so they evolved to nurture babies in a womb in order to send them adequate oxygen. Mammals also devised a diaphragm for efficient respiration. This caused them to lose the lower half of their ribs, but as a result they could lie on the ground while twisting their waist. Now they were capable of breast-feeding.

Episode Five

Survival Of The Fittest

Over its more than 4-billion-year history, Earth has been home to repeated violent climatic changes, which have caused mass extinctions. And yet, life has survived. These same catastrophes that devastated life on Earth also helped bring about its evolution.

Tags

         

Other videos in channel "Planet":

A World Without Water A World Without Water After The Warming After The Warming Age Of Stupid Age Of Stupid
Antarctica Antarctica Death of the Oceans Death of the Oceans
Disaster At Death Coast Disaster At Death Coast Earth Story Earth Story Earth's Invisible Shield Earth's Invisible Shield
El Niño El Niño Europe A Natural History Europe A Natural History
Flow: For The Love Of Water Flow: For The Love Of Water Freak Wave Freak Wave Global Dimming Global Dimming
Global Weirding Global Weirding Great Discoveries - Earth Sciences Great Discoveries - Earth Sciences Greenhouse Effect - (1988) Greenhouse Effect - (1988)
Hot Planet? Hot Planet? How Earth Made Us How Earth Made Us How the Earth was Made How the Earth was Made
How the Earth Works - Lecture How the Earth Works - Lecture Invaders From The Sea Invaders From The Sea Japan Earthquake Japan Earthquake
Jetstream Jetstream Journeys from the Centre of the Earth Journeys from the Centre of the Earth Killer Algae Killer Algae
Killer Lakes Killer Lakes Last Days On Earth Last Days On Earth Lightning: Nature Strikes Back Lightning: Nature Strikes Back
Magnetic Storm Magnetic Storm Master of the Ionisphere Master of the Ionisphere Measuring the Roof of the World - (1991) Measuring the Roof of the World - (1991)
Mega Tsunami - Wave Of Destruction Mega Tsunami - Wave Of Destruction Men Of Rock Men Of Rock Miracle Planet Miracle Planet
Planet Earth - The Living Machine Planet Earth - The Living Machine Planet In Peril Planet In Peril Snowball Earth Snowball Earth
The 11th Hour The 11th Hour The Big Chill The Big Chill The Climate Wars The Climate Wars
The Core The Core The Day the Earth Nearly Died The Day the Earth Nearly Died The Day The Oceans Boiled The Day The Oceans Boiled
The Day The Wave Came The Day The Wave Came The Living Planet - The Building of the Earth The Living Planet - The Building of the Earth The Living Sea The Living Sea
The Lost World of Lake Vostok The Lost World of Lake Vostok The Man Who Moved The Mountains The Man Who Moved The Mountains The Next Megaquake The Next Megaquake
The Power Of The Planet The Power Of The Planet Volcano Hell Volcano Hell What's Killing The Sea Otters? What's Killing The Sea Otters?
Why Can't We Predict Earthquakes ? Why Can't We Predict Earthquakes ?    
Video channels
Videos in this channel
AdSense
Featured
Featured
Featured
Featured
Featured
Featured