Sentences with phrase «microscopic particles called»

Not exact matches

In a series of papers, Firestone and his colleagues claimed various kinds of evidence for the hypothesis, including deposits of the element iridium (rare on Earth but abundant in meteorites), microscopic diamonds (called nanodiamonds), and magnetic particles in deposits at sites supposedly dated to about 12,800 years ago.

Tiny microscopic animals called zooplankton are ingesting plastic particles at an alarming rate, according to a new study by Dr. Peter Ross, head of the Ocean Pollution Research Program at Vancouver Aquarium Marine Science Centre.

Opposing theories — one drawing mostly on experimental evidence, the other on results of modeling studies — have been proposed to explain shear thickening in suspensions of microscopic particles, also called colloids.

Several proposals call for injecting microscopic particles, called aerosols, into the stratosphere, the quiet region of the atmosphere above the troposphere about 18 kilometers up from the equator.