Category: Old Era
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Tornadoes
A tornado warning has been issued and you are in the path of one of the 1,200+ tornadoes that hit the United States each year. How quickly can you get to a safe place out of the severe weather? Do you have a plan? Where would you go? Will you, your family, your students be safe? These violently rotating columns of…
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Phase Transitions: Melting, Boiling, and Subliming
Substances can change phase — often because of a temperature change. At low temperatures, most substances are solid; as the temperature increases, they become liquid; at higher temperatures still, they become gaseous. The process of a solid becoming a liquid is called melting (an older term that you may see sometimes is fusion). The opposite process, a liquid…
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How Much Electricity Does a Lightning Bolt Contain?
Check out the previous article on Lightning. Did you know that a single lightning bolt unleashes five times more heat than the sun? That’s a lot of energy seeing that 40 minutes of sunlight contains enough energy to power all of Earth’s energy needs for an entire year. Or to put it more scientifically, the…
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What is Lightning?
What exactly is a lightning bolt or strike, how does it occur, and what are its effects? Even if you never personally experienced a lightning storm before, you most certainly would have seen it on television, online, or even in the movies. This is one of nature’s most spectacular and potentially deadly displays. A lightning…
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Tissue Regeneration in Humans
Protein Critical for Tissue Regeneration Discovered A flatworm well-known for its unique ability to regenerate cells is giving scientists at the University of California, more light on how cancer could be treated and how regenerative medicine could better target diseases. It has been shown that signaling by a protein called Target of Rapamycin (TOR) found…