Liquefaction is a phenomenon in which the strength and stiffness of a soil is reduced by earthquake shaking or other rapid loading. Liquefaction can cause major damage during an earthquake. In this ...

We take over the Operation Ouch! lab in this fun science lesson for 7-11 year-olds all about healthy hearts and circulation. Dr. Chris and Dr. Xand van Tulleken explain where the heart is in the body, ...