Are there living organisms in space?

6 Fascinating Facts About the Tardigrade, the Only Animal That Can Survive in Space. All hail the toughest organism on Earth. Tardigrades are one of the most fascinating creatures on Earth—and the moon.

Is there more animals or humans on Earth?

Scientists have recently estimated that there are approximately 8.7 million species on Earth. They believe that 1-2 million of those species are animals. Scientists believe there are over seven billion humans in the world today. That’s a staggering number, but there are more chickens (over 18 billion) than humans.

What is the set of all life forms on Earth?

The biosphere is made up of the parts of Earth where life exists—all ecosystems. The biosphere extends from the deepest root systems of trees, to the dark environments of ocean trenches, to lush rain forests, high mountaintops, and transition zones like this one, where ocean and terrestrial ecosystems meet.

Are there any extraterrestrial life-forms scientifically possible?

Science predicts many examples of counterintuitive forms of life. While impossible on Earth, they could very well exist elsewhere in the universe. So, without further ado, here are the top 10 scientifically possible extraterrestrial life-forms.

Are We the only life-bearing planets in the universe?

In a galaxy that likely holds trillions of planets, ours is so far the only known life-bearing world. Are we really alone? Life in the Universe: What are the Odds? Life in the Universe: What are the Odds?

Does carbon-based life exist on other planets?

Additionally, carbon-based life is the only type that we are sure exists, as evidenced by our own planet. This isn’t to say that carbon-based life on other planets would look at all like Earth’s. Through evolution, it is possible for extraterrestrial carbon-based life to take on a dramatically different form by adapting to fit its environment.

Are there single-celled organisms on Earth?

It is possible—though there is so far no good evidence for this—that there are single-celled organisms on Earth that are unlike the DNA-protein life that we know and that remain undetected. Certainly such life would be invisible to DNA probes. But in the absence of any evidence, it’s difficult to speculate much further along these lines.