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I think that 1 billion years ago wasn’t very similar to the world today becuase of obvious reasons but the earth has been around for more than 1 billion years so I think that there were the first human and many animals. I’m sure that the earth was flourishing with growth.

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On Earth, one billion years ago, only multicellular organisms (nothing too extravagant such as dinosaurs) existed at that time because things were just starting to form. As well I feel the landscape and Earth as a whole looked different.

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There was barely anything on Earth a billion years ago. The best animal we had was a multicellular soft worm. Everything was pretty simple and there wasn’t anything complex.

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1 billion years ago the earth was probably covered with many multicellular organisms.

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I think there was not alot of life other than some micro organisms underwater starting to form multicellular organisms.

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I think the Earth 1 billion years ago did not have a lot. There weren't that many species of plants and animals, and organisms were only starting to grow.

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I think the earth looked very different back then and there wasn’t as many creatures living as there are today. There wasn’t as many plants living back then. Multicellular organisms started to form around this time.

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I believe that 1 billion years ago the Earth was much different. There were probably different types of species living on earth than there is now and organisms began to grow.

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1 billion years ago, there were huge creatures such as dinosaurs and many others like oversized bugs and insects. There were many creatures that were either very unevolved because of how recent they’ve evolved from single celled organisms. Many of the animals just started to walk on water and many animals evolved diversely from the cabrian explosion. Flowers started to bloom while dinosaurs fizzled out into the mammals.

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1 billion years ago a single supercontinent evolved where it was solely just rock. Multicellular organisms were starting to evolve, causing changes to the earth that caused oxidization and the first few "snowball Earth" events and extinctions.

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1 billion years ago, on Earth, cells were just starting to form larger organisms . Things like mouths, limbs, and organs started to grow. These then evolved later to lands and animals.

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1 Billion years ago... desolate Earth. Mostly water and aquatic animals. Different groups of organisms probably evolved multicellularity independently during this time period.

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I think the Earths surface looked different than it does today. There were many plants animals and animals that we don't usually see today. Now cells were teaming up to form larger organisms. With plants well-established on land, the next step was for animals to move out of the water.

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I think that 1 billion years ago on Earth, the surface looked different. The atmosphere was changing, like the plants and oxygen. There was also complex cells forming. Extinction was happening too.

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Geologists believe that Earth’s surface was filled with vegetation. Multicellular organisms were beginning to form.

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1,000,000,000 years ago I think it was very different. There weren’t any big animals but cells started forming larger organisms. Plants were changing and using photosynthesis to create oxygen.

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I think that before the earth looked like different. That is because the cells in the organisms changed.

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There were organisms but they were much smaller. They might have been microscopic. Around this time organisms began to be multicellular. There was smaller levels of oxygen one billion years ago.

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I think the Earth looked different than it does now. Complex cells began to develop. There was a change in the atmosphere, due to plants and oxygen. Extinction was also occurring quite frequently. There were many different plants and animals. Soft bodied animals began to develop, such as, worms.