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Life is durable and Earth-like planets aren’t rare. So where are all the aliens?
Potentially habitable planets are more plentiful then we once thought: there are trillions in the Universe, and an estimated million in the Milky Way alone. Looking inward at our own small life-sustaining planet, we’ve also discovered that life isn’t nearly as delicate as we had imaged: lifeforms exist buried in the Earth’s crust and deep underwater, in extreme heat and extreme cold. So why, in every search for intelligent life elsewhere in the Universe, have we come up so utterly empty?
Video by Kurzgesagt
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Knowledge
Why it takes more than a lifetime to truly understand a single meadow
11 minutes
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Physics
Groundbreaking visualisations show how the world of the nucleus gives rise to our own
10 minutes
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Earth science and climate
There’s a ‘climate bomb’ ticking beneath the Arctic ice. How can we prepare?
8 minutes
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Physics
To change the way you see the Moon, view it from the Sun’s perspective
5 minutes
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Ecology and environmental sciences
GPS tracking reveals stunning insights into the patterns of migratory birds
6 minutes
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Space exploration
The rarely told story of the fruit flies, primates and canines that preceded us in space
12 minutes
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Neuroscience
This intricate map of a fruit fly brain could signal a revolution in neuroscience
2 minutes
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Computing and artificial intelligence
The ‘cloud’ requires heaps of energy to stay aloft. Could synthetic DNA be the answer?
12 minutes
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Biology
Brilliant dots of colour form exquisite patterns in this close-up of butterfly wings
3 minutes