Certain scientists propose that the water on Earth may have originated from comets. This theory is bolstered by the discovery of ice on comets and the observation that some of the water from these comets shares a similar chemical composition with ocean water. For instance, analyses of the comet known as 67P revealed that its water closely resembles that found on Earth. This indicates that when comets collided with our planet in the distant past, they may have delivered significant amounts of water.
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Some scientists believe that Earth's water might have come from comets. This idea is supported by the fact that scientists have found ice on comets, and some of the water in those comets has a similar makeup to the water in our oceans. For example, tests of a comet called 67P showed that the water it has is very much like the water we have on Earth. This suggests that when comets crashed into our planet a long time ago, they could have brought a lot of water with them.
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