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New Cell Atlases Reveal Untold Variety in the Brain and Beyond
...organ. How these cells are distributed and are related to one another suggests many intriguing ideas about the evolution of the mammalian brain. Last month, in another landmark contribution to...
The Year in Biology
...prevailing wisdom and reveal a stronger, better intellectual framework. Both kinds of revolution unleash avalanches of new ideas and insights that improve our understanding of how life works. This past...
Evolution: Fast or Slow? Lizards Help Resolve a Paradox.
...paradox of stasis.” Evolution’s Steady Hand? When early evolutionary theorists conceived of natural selection, they reckoned that the evolutionary process works gradually over vast epochs. Species don’t evolve overnight; they...
How Did Altruism Evolve?
...classical notion of evolutionary biology where everything is just about selfish survival. I think you’ve explained well why there would be evolutionary pressure in the longer term to have this...
A Multitalented Scientist Seeks the Origins of Multicellularity
...when those identities are not well represented,” explained Extavour, an evolutionary geneticist who in 2014 became the first Black woman to win tenure in the biological sciences at Harvard’s Faculty...
What Is the Nature of Time?
...that radiation tends to go out from things and not come in. There’s this arrow of time associated with evolution of life. And many others you could invent on the...
Mollusk Eyes Reveal How Future Evolution Depends on the Past
The visual systems of an obscure group of mollusks provide a rare natural example of path-dependent evolution, in which a critical fork in the creatures’ past determined their evolutionary futures....
Cellular Self-Destruction May Be Ancient. But Why?
...membrane are all that remains. “It’s really amazing how fast, how organized it is,” said Aurora Nedelcu, an evolutionary biologist at the University of New Brunswick who has studied the...
Tiny Tweaks to Neurons Can Rewire Animal Motion
Altering a protein in the neurons that coordinate a rattlesnake’s movement made a slow slither neuron more like a speedy rattle neuron, showing one way evolution can generate new ways...