He liked the loneliness of inner space, the sense of being forgotten by the world.

During climbs into taller trees, I was occasionally able to look down on the backs of birds, which shine with reflected sunlight as they move through the green depths of the canopy, like schools of fish.

If equations are trains threading the landscape of numbers, then no train stops at pi.

It showed a kind of obscenity you see only in nature, an obscenity so extreme that it dissolves imperceptibly into beauty.

He liked the loneliness of inner space, the sense of being forgotten by the world.

To mess around with Ebola is an easy way to die. Better to work with something safer, such as anthrax.

In biology, nothing is clear, everything is too complicated, everything is a mess, and just when you think you understand something, you peel off a layer and find deeper complications beneath. Nature is anything but simple.