Did you know that Colonial Americans used large sheets of mica as glass for windows?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
Magnetic polarity reversal
xMagnetic polarity reversal : A magnetic polarity reversal is a change of the earth's magnetic field to the opposite polarity. This has occurred at irregular intervals during geologic time.
Scientists in South Africa have discovered two fossil skeletons that are about two million years old. These skeletons are of a young male and adult female of a species that had never been found before....Read more