Tag: PNAS
Membrane Channels Show Astonishing Specificity
The “selectivity filters” in membrane channels of living cells are able to discriminate between very similar molecules or atoms using complex mechanisms.
Placozoa: An Evolutionary Leftover?
Simple, small, and worldwide in distribution, the placozoa don’t fit any clear evolutionary picture.
Inside the Machine Room of the Nucleus
The nucleus is a beehive of activity, where information is not just stored but processed, protected, transcribed, and duplicated by highly complex machines.
Meet the Fuxianhuiids: Exploding Cambrian Arthropods
True arthropods are among the most sophisticated animals that appeared without ancestors in the Cambrian explosion.
When Evolving Life, Don’t Forget the Astrophysics
What happens down here depends a lot on what’s going on up there.