RICHARD PRESTON

Dragonflies kill their prey in the air and eat it on the wing. They feed on aerial plankton, which consists of any sort of small living thing that happens to be aloft - mosquitoes, midges, moths, flies, ballooning spiders.

I'm all in favor of looking deeply into as much as we possibly can. I'm not afraid of knowledge... With all new technology, weapons inevitably emerge... Evil comes out of the human heart. It doesn't come out of nature.

Seeing outward is equivalent to looking backward in time because the telescope's mirror is capturing primeval light... galaxies that existed before our time.

Experiments suggest that if one particle of Ebola enters a person's bloodstream, it can cause a fatal infection. This may explain why many of the medical workers who came down with Ebola couldn't remember making any mistakes that might have exposed them.

If a vaccine works, then the vaccinators might conceivably set up what's known as ring vaccinations around Ebola hot spots. In this technique, medical workers simply vaccinate everybody in a ring, miles deep, around a focus of a virus.

An Ebola particle is only around eighty nanometres wide and a thousand nanometres long. If it were the size of a piece of spaghetti, then a human hair would be about twelve feet in diameter and would resemble the trunk of a giant redwood tree.

Life on the planet is being homogenized by the expanding human population and the frequent and rapid movement of people and goods, which carry invasive organisms with them. These invasives often flourish in their new ecosystems because, like the woolly adelgid, they have escaped their predators.

Botanists have a tradition of never revealing the exact location of a rare plant. Contact between humans and rare plants is generally risky for the plants.

There may be a little bit of finger-pointing - there always is in a situation like this - but I think of Ebola as an act of nature. It's the biological equivalent of a tsunami, and yes, we are having trouble handling it.

If you want to survive Ebola, you need to be young. If you're in your late 30s, the death rate is about 80 percent, and if you're over 45, then the death rate goes up to about 90 percent.

When you get up into the crown of a redwood tree, you lose sight of the ground entirely. You also lose sight of the sky. And you're in a lost world. You're in an undiscovered, unexplored ecosystem, somewhere between Heaven and Earth, filled with forms of life, not all of which have been given names by scientists yet.

We're creating these massive urban areas in the Third World. It's like you take the entire population of California and put it in one city. Then you remove basic sanitation and medical services, and you have a ticking biological time bomb.

Green darners never attack people, but they have been seen bringing down hummingbirds. They are the Bengal tigers of the microworld.

If a healthy person were placed on the other side of a room from a person who was sick with AIDS, the AIDS virus would not be able to drift across the room through the air and infect the healthy person.

The dragonfly is an exceptionally beautiful insect and a fierce carnivore. It has four wings that beat independently. This gives it an ability to maneuver in the air with superb dexterity. A dragonfly can put on a burst of speed, stop on a dime, hover, fly backward, and switch direction in a flash. This is a hunting behavior known as hawking.

It turns out, from what I hear, that roasted fruit bats are delicious.

In the course of writing 'First Light,' I climbed all over and through the Hale Telescope, where I found rooms, stairways, tunnels, and abandoned machines leaking oil. My notebooks show tooth-marks where I gripped them with my teeth while climbing around inside the telescope, and the notebooks are stained with Flying Horse telescope oil.

I don't believe in a biological apocalypse, but I think there is stormy biological weather ahead as the human population continues to grow.

The earth's biosphere could be thought of as a sort of palace. The continents are rooms in the palace; islands are smaller rooms. Each room has its own decor and unique inhabitants; many of the rooms have been sealed off for millions of years. The doors in the palace have been flung open, and the walls are coming down.

Though the redwoods in Muir Woods are hauntingly beautiful trees, they are relatively small and not very tall, at least for redwoods.

I think we sometimes give ourselves a little too much credit as humans, as being able to control and understand nature, when in fact we do neither.

A football player is often bigger than a basketball player - more massive, that is. The basketball player is taller and more slender. So it is with redwoods. The tallest redwoods are often slender, and so they aren't the largest ones.

The crown of a supertall redwood has a towering, cloudy, irregular form, and the crowns of the tallest redwoods can sometimes look like the plume of exhaust from a rocket taking off.

The redwoods you can see in Muir Woods are nothing like the redwood titans that stand in the rainforest valleys of the North Coast, closer to Oregon. These are the dreadnoughts of trees, the blue whales of the plant kingdom.

Global climate change has become entangled with the problem of invasive species. A warmer climate could allow some invaders to spread farther, while causing native organisms to go extinct in their traditional habitats and making room for invaders.