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A Billion Years Before Sex, Ancient Cells Were Equipped for It
Molecular detective work is zeroing in on the origins of sexual reproduction. The protein tools for cell mergers seem to have long predated sex — so what were they doing?
DNA’s Histone Spools Hint at How Complex Cells Evolved
New work shows that histones, long treated as boring spools for DNA, sit at the center of the origin story of eukaryotes and continue to play important roles in evolution and disease.
Did Viruses Create the Nucleus? The Answer May Be Near.
An unorthodox symbiotic theory about the origin of eukaryotes’ defining characteristic may soon be put to the test.
Billion-Year-Old Algae and Newer Genes Hint at Land Plants’ Origin
A recently unearthed fossil and new genomic discoveries are filling important gaps in scientists’ understanding of how primitive green algae eventually evolved into land vegetation.
Heat-Loving Microbes, Once Dormant, Thrive Over Decades-Old Fire
In harsh ecosystems around the world, microbiologists are finding evidence that “microbial seed banks” protect biodiversity from changing conditions.