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from Boston.com

Challenger disaster: remembered

The crew of the space shuttle Challenger. From left: Ellison Onizuka, Mike Smith, Christa McAuliffe, Dick Scobee, Greg Jarvis, Ron McNair and Judith Resnik. (NASA/1986) via Boston Globe

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from About.com Education

Explosion

Jan. 28, 1986, the space shuttle "Challenger" explodes 73 seconds after takeoff from Cape Canaveral, FL, killing all seven crew members.

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from Teachers Pay Teachers

STEM Activity Challenge Earthquake Resistant Building

STEM Challenge: Build an earthquake resistant house and then try it! Give it some vigorous shaking for 15 seconds! Will it stay upright?

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"the elephant's foot"ONE OF THE MOST DANGEROUS PICTURES TAKEN The above picture you see is off the elephant’s foot, a radioactive mass. It’s from the Chernobyl nuclear disaster. These are the effects: After just 30 seconds of exposure, dizziness and fatigue will find you a week later. Two minutes of exposure and your cells will begin to hemorrhage (ruptured blood vessels); four minutes: vomiting, diarrhea, and fever. 300 seconds and you have two days to live.

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from Brit + Co

Scrubba: The World’s Smallest Washing Machine

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You can use any sort of signalling device but a whistle is a an excellent choice when available. These whistle codes are pretty standard in all sorts of disciplines. Military, Law Enforcement, SAR and many other governmental agencies use this methodology. Keep in mind that THREE of anything is typically understood as distress and should illicit a response from available resources. #CodeOfWhistle #OutdoorSurvival #Whistle #WildernessSurvival

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