John Vidale and his team at the Pacific Northwest Seismic Network are monitoring ground motion across Washington State and Oregon to prepare residents for one of the most powerful natural hazards on the planet - a magnitude 9 "megathrust" earthquake. "When Nature Strikes" is produced by NBC Learn in partnership with the National Science Foundation and The Weather Channel.
STEM Challenge: Can you build a marble maze? Using some basic supplies like cardboard, construction paper, and tape what can you build?Please note: This challenge is available in a bundle at a money-saving price.UPDATED MAY 2015! This best -selling STEM challenge has undergone an update.