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Weather: Staying Safe in a Storm

Staying Safe in a StormWeatherThere's No Place Like HomeThunderstormsDoing the TwistThe ChaseStaying Safe in a Storm In a tornado, winds are so great that brick and concrete walls can collapse.…

Selected Biographies: I

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z More Biographies Don't see the biography you're looking for? Search 30,000+ biographies Biographies…

DK Science: Sound

PERSONAL VOICEPRINTWAVE MAKERCONVERSATION IN SPACESPEED OF SOUNDFIND OUT MOREWhat would our world be like without sound? Complete silence might seem peaceful, but there would be no speech, music…

Geometry: Symmetry

SymmetryGeometryTransformationsIsometriesDilationsSymmetry Just what is symmetry? Symmetry is one of those things that you can recognize but cannot put into words. Many words or phrases have a…

The Supreme Court: Getting Searched on a Bus

Getting Searched on a BusThe Supreme CourtCollecting EvidenceSearching Your Car When You're Stopped for SpeedingUsing the Right Not to KnockFinding Marijuana with Thermal-Imaging…