Did you know that Huizilopochtli was dressed with hummingbird feathers on his head?
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.
Global warming is a hot topic, and it's causing concern for scientists studying winter annuals in the Sonoran Desert. While desert winters have become warmer and drier over the years, climate changes have...Read more