This causes an animal trapped in quicksand to sink deeper when it moves trying to escape from the quicksand trap." The authors added that viscosity can reach extremely high levels in such an ...

Quicksand is odd: a bed of silt becomes saturated with water so that its grains no longer cohere. Heavy objects — a cow, a log, my husband — sink readily but can't easily rise. Quicksand ...

and then compare that to the forces needed to escape from quicksand. The clip is also useful when discussing density, floating, sinking and Archimedes. Students could measure volume, mass and ...