Cell biologist Junyue Cao of Rockefeller University argues that aging follows a structured, stepwise progression rather than being simple molecular wear and tear. Using single-cell genomic tools to track aging in mice across the body, his lab identified distinct stages marked by shifts in molecular signals and cell populations, resembling phases of embryonic development. Cao suggests this programmed decline likely starts before age 30 in humans.
quantamagazine.org
· 2026-09-22
Stanford Medicine researchers discovered that the human brain is actually built from two distinct developmental lineages: a hindbrain system controlling breathing and heartbeat, and a forebrain/midbrain system responsible for higher cognition. The team found these two regions arise from separate progenitor pathways rather than one branching from the other, and used this insight to finally grow functional hindbrain motor neurons from human stem cells in the lab. They also traced this dual-origin pattern back over 550 million years, finding it in chickens, zebrafish, and acorn worms.
science.slashdot.org
· 2026-09-20
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