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origins of life

Space

Comets may bring ingredients for life most easily to clustered planets

Comets may be a key source for the building blocks of life, but the only planetary systems where those ingredients could survive impact may be ones with large stars or lots of neighbouring worlds

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An illustration of the early surface of Earth with a volcano erupting in the background.

Life

How we will discover the mysterious origins of life once and for all

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A mitochondrion

Life

Ocean bacteria may be closest relatives of mitochondria in our cells

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Mars

Space

Mars used to have wet and dry seasons similar to ones on Earth

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Life

How a radical redefinition of life could help us find aliens

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Life

1.6-billion-year-old steroids may be traces of earliest complex life

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Unicellular green algae with large cells.; Shutterstock ID 1042159933; purchase_order: -; job: -; client: -; other: -

Life

Why the origins of life remain a mystery 鈥� and how we will crack it

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Earth

Oxygen on early Earth may have come from quartz crushed by earthquakes

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The Murchison meteorite

Chemistry

Building blocks for life may be able to form in radioactive meteorites

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Dark blue ocean surface seen from underwater. Waves underwater and rays of sunlight shining through

Life

Experiments hint at how molecules essential to all life first arose

A series of chemistry experiments suggest that a molecule that provides energy for all living cells, called ATP, could have been forged in geothermal vents in the ocean or created in freshwater ponds

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Life

Self-replicating protein factories are a step towards artificial life

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Physics

Is life the result of the laws of entropy?

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Life

Why is the universe just right for life? Blame the multiverse

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Humans

Why do we exist? The meaning of life isn鈥檛 to be found in the stars

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