This is a preview. Log in through your library . Abstract This paper examines the vital role played by electron microscopy toward the modern definition of viruses, as formulated in the late 1950s.

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Researchers have designed and built the world’s first microscope ...

Since its discovery in 1999, the near-Earth asteroid Bennu has captivated scientists as a time capsule from the early solar system — and also as a key to possibly understanding the origins of life. To ...