Do you know the main points of the theory of natural selection?
Earth and Space Science Concept of the Day
Do you know what this word or phrase means?
Rayleigh wave
xRayleigh wave : A Rayleigh wave is a seismic surface wave causing the ground to shake in an elliptical motion, with no transverse, or perpendicular, motion.
Daniel Wolf Savin, a senior research scientist at Columbia University's Astrophysics Laboratory, has published a paper on the research he and his colleagues have done on how stars began. In their research,...Read more