What Causes Ice Ages....Or Global Warming?
We know from the rock record and cores taken from polar ice caps that periods of global cooling (ice ages, or periods of glaciation) have alternated with warmer, more temperate periods having climates similar to what we now experience (interglacial periods).…
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Biology
Bird Flu, Swine Flu, Human Flu
Influenza, unlike many viruses that make humans sick, can also affect birds and pigs. Generally strains of the…
Mathematics
Origins Of The Meter
The origins of the meter go back to at least the 18th century. At that time, there were two competing…
Chemistry
Liquid Glass Is All Wet
As a liquid changes to a solid, its molecules go from a state of turmoil and chaos to a state of order. As…
Astronomy
Hats Off to the Sombrero
This nearly edge-on view of the Sombrero galaxy shows that the disks of spiral galaxies are incredibly thin.…