The myosin in our own skeletal muscles is more closely related to the myosin driving the flight muscles of that irritating housefly buzzing around your head than it is to the myosin in the muscles...

Nothing is more conservative than a bacterium.

The point I want to make about methanogens is that they were the losers in the race through a bottleneck, yet nonetheless survived in niche environments. Similarly, on a larger scale, it is rare for...

It seems that all eukaryotic cells either have, or once had (and then lost) mitochondria. In other words, possession of mitochondria is a sine qua non of the eukaryotic condition

We should not be too quick to dismiss our own [ocular] arrangement. As so often in biology, the situation is more complex…..we have the advantage that our own light-sensitive cells are embedded directly in their...