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.
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.
The annual flight of the dragonflies goes mostly unnoticed, though it is one of the great migrations of flying creatures that occur across North America.
'First Light' is nonfiction, a true story about astronomers who are looking for light coming from the edge of the universe. It tells how science is really done - and science is a lot weirder and more human than most people realize.
Green darners never attack people, but they have been seen bringing down hummingbirds. They are the Bengal tigers of the microworld.
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.