Abstract Variations in the sequence of mitochondrial DNA can be used to identify human lineages and mark human migration patterns.  In 1987, mtDNA samples from 147 women were compared and used to infer the sequence and origin of the mitochondria of the common ancestor of all humans.  The popular press and science writers were quick […]

  Photo: NASA Abstract: The Universe began in a hot and dense state. After ten minutes or so, the elements had formed, and for the next few hundred thousand years the Universe was filled with hot plasma, expanding and cooling. The Universe was opaque; any light emitted would be scattered or absorbed before it could […]

Elon Musk: Man With a Purpose We asked Science Circle students what topics they would like to hear and Elon Musk was one request. Well, I was curious also, so […]

Elon Musk: Man With a Purpose We asked Science Circle students what topics they would like to hear and Elon Musk was one request. Well, I was curious also, so […]