Robin's Egg Blue
Turquoise, the robin's egg blue gemstone worn by Pharaohs and Aztec Kings, is probably one of the oldest gemstones known. Yet, only its prized blue color, a color so distinctive that its name is used to describe any color that resembles it, results in its…
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Biology
What Are Blood Types, and Why Are They Important?
If your medical report reads A, Rh+, M, s, P1, Lua, K+, Kp(a-b+), Le(a-b+). Fy(a+), Jk(a+b+), don't run for a…
Geology
Flipping Magnetic Fields
North and south. We take these directions for granted. Pull out a compass and the needle will swing to the…
Astronomy
Amazing GRACE
Gravity has an effect on everyone and everything on Earth. Although we can't see it, smell it, taste it or…
Geology
How Do We Predict The Climate--100,000 Years Ago?
Since the only ice age that occurred during human existence ended 10,000 to 12,000 years ago, how can we know…