Rule of Thumb

LOOKING FOR EXTRATERRESTRIAL DUST

Hoping to find samples of cosmic dust, NASA scientists carefully inspect tiny particles captured by high-flying planes. They have a ...

Hoping to find samples of cosmic dust, NASA scientists carefully inspect tiny particles captured by high-flying planes. They have a rule of thumb: If a particle is large enough to see without a microscope, it is probably contamination of their sample and not extraterrestrial debris. — Dr. Uel Clanton, associate curator for cosmic dust, Johnson Space Center

01/4/15

© 2022