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  1. From the heavily cratered and atmosphereless surfaces of both Mercury and the Moon to the hot sulfurous fogs of Venus and the dusty, windswept surface of Mars, no sign of life is apparent anywhere. The biosphere, by definition the place where all Earth ’s life dwells, is a delight with its green, wet contrast.

  2. The timeline of life on earth begins over 4.5 billion years ago. In the beginning, survival was difficult for any life forms. The struggle started and soon after earth’s formation, organisms start appearing. It makes sense the first signs of life on planet earth are incredibly simple.

  3. Jan 16, 1979 · Life on Earth TV Mini Series 1979 11 h 42 m IMDb RATING 9.1 /10 3K YOUR RATING Rate POPULARITY 21,222 5,142 Documentary David Attenborough's groundbreaking study of the evolution of life on our planet. Star David Attenborough See production, box office & company info Add to Watchlist 8 User reviews Nominated for 4 BAFTA Awards

    • (3K)
    • 1979-01-16
    • Documentary
    • 702
  4. Life on Earth (TV series) Life on Earth: A Natural History by David Attenborough is a British television natural history series made by the BBC in association with Warner Bros. Television and Reiner Moritz Productions. It was transmitted in the UK from 16 January 1979.

    • 16 January –, 10 April 1979
    • BBC Two
    • in The Beginning
    • An Oxygen Atmosphere
    • Multicellular Life
    • The First Animals
    • Ediacaran Biota
    • The End-Ediacaran Extinction
    • The Cambrian Explosion

    Today we take for granted that we live among diverse communities of animals that feed on each other. Our ecosystems are structured by feeding relationships like killer whales eating seals, which eat squid, which feed on krill. These and other animals require oxygen to extract energy from their food. But that’s not how life on Earth used to be. With...

    When cyanobacteria evolved at least 2.4 billion years ago, they set the stage for a remarkable transformation. They became Earth’s first photo-synthesizers, making food using water and the Sun’s energy, and releasing oxygen as a result. This catalyzed a sudden, dramatic rise in oxygen, making the environment less hospitable for other microbes that ...

    However, other innovations were occurring. While they can process lots of chemicals, microbes did not have the specialized cells that are needed for complex bodies. Animal bodies have various cells –skin, blood, bone – which contain organelles, each doing a distinct job. Microbes are just single cells with no organelles and no nuclei to package the...

    These clusters of specialized, cooperating cells eventually became the first animals, which DNA evidence suggests evolved around 800 million years ago. Spongeswere among the earliest animals. While chemical compounds from sponges are preserved in rocks as old as 700 million years, molecular evidence points to sponges developing even earlier. Oxygen...

    By about 580 million years ago (the Ediacaran Period) there was a proliferation of other organisms, in addition to sponges. These varied seafloor creatures - with bodies shaped like fronds, ribbons, and even quilts - lived alongside sponges for 80 million years. Their fossil evidence can be found in sedimentary rocks around the world. However, the ...

    However, about 541 million years ago, most of the Ediacaran creatures disappeared, signaling a major environmental change that Douglas Erwin and other scientists are still working to understand. Evolving animal body plans, feeding relationships, and environmental engineering may have played a role. Burrows found in the fossil record, dating to the ...

    The Cambrian Period (541-485 million years ago) witnessed a wild explosion of new life forms. Along with new burrowing lifestyles came hard body parts like shells and spines. Hard body parts allowed animals to more drastically engineer their environments, such as digging burrows. A shift also occurred towards more active animals, with defined heads...

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    How did life first begin on Earth?

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  6. "Life on Earth" is not an ordinary idle game, but also a professional education game about life evolution. You can not only experience the easy and funny idle evolution games, but also learn the...

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