Tag: PNAS
Still More Excuses for Cambrian Non-Evolution
Trilobites look up silently from their Burgess Shale rock slabs, with sad eyes, asking, “Where did I come from?”
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.