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Astrobiology Still Has No Biology

Number of worlds beyond Earth where life has been discovered: zero. Number of optimistic articles about life in outer space: hundreds per year.

Mars Life Hopes Reduced

Key assumptions about habitability on Mars have fallen, but astrobiologists try to keep hope alive.

Precambrian Protein Identified

They say it's almost two billion (with a B) years old, yet it resembles modern counterparts.

Crinoid Pigment: 240 Million Years and No Evolution

Pigments from crinoids fossilized in early Mesozoic strata are identical to modern counterparts.

Left-Handed Life: Is the Chirality Problem Near Solution?

Cells use only left-handed amino acids and right-handed sugars. A new hypothesis involving the weak nuclear force tries to address this asymmetry.
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