Viruses have to live somewhere. They can only replicate in living creatures. So, when the Ebola virus disappears between outbreaks, it has to be living in some reservoir host, presumably some species of animal.

As the births of living creatures are at first ill-shapen, so are all innovations, which are the births of time.

I'm trying to figure out the biology of dinosaurs and what they were like as living creatures.

The more cases of Ebola infection we have, the more chances there are for the virus to mutate in a particular way that adapts it well to living in humans, replicating in humans, and perhaps transmitting from human to human.

When a man has pity on all living creatures then only is he noble.

The fertility cycle is a cycle entirely of living creatures passing again and again through birth, growth, maturity, death, and decay.