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A Human Mission to Mars? Not Yet

Water on Mars The scientific community was intrigued by the startling announcement in June 2000 that some high-resolution images of Mars taken by the Mars Global Surveyor showed strong evidence of…

Life-Changing Science Discoveries

Try to imagine life without antibiotics. We wouldn’t live nearly as long as we do without them. Here’s a look at some discoveries that have changed the world. It’s impossible to rank their…

Weather: Types of Precipitation

Types of PrecipitationWeatherBring on the RainDroplet to Drop … How Rain HappensTypes of PrecipitationFooling the CloudsSo Why Does It Rain? Precipitation can take on many different forms. The…

Weather: What Makes the Weather Go 'Round

What Makes the Weather Go 'RoundWeatherGoing in CirclesFeeling the PressureHigh Points and LowWhat Makes the Weather Go 'RoundWhat's in a Name?Scales of Motion While high and low pressure areas are…

DK Science: Atmosphere

AURORASLAYERS OF THE ATMOSPHEREOZONE LAYERFIND OUT MOREPRESSURE SYSTEMSThe Earth would be as lifeless as the Moon without the atmosphere – a blanket of gases surrounding the planet and…

DK Science: Erosion

COASTAL EROSIONGLACIAL EROSIONWIND EROSIONCHEMICAL WEATHERINGMASS MOVEMENTFIND OUT MOREThe process that breaks up and carries away the rocks and soils that make up the Earth’s surface is called…

DK Science: Telecommunications

MAKING A TELEPHONE CALLOPTICAL FIBRESFIND OUT MORETelecommunications began more than 160 years ago, with telegraphs and telephones working through wires. We still use wires – known as landlines…

DK Arts & Entertainment: Olympics

WHO INVENTED THE MODERN OLYMPICS? WHO RUNS THE OLYMPICS NOW? WHAT IS THE OLYMPIC IDEAL? ANCIENT OLYMPICSTRACK AND FIELDFIND OUT MOREThe Olympic Games are the world’s biggest sporting spectacle.…

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Ralph NaderJacques NeckerArthur NegusWalter Loomis NewberryJohn NewberyMontagu Collet, NormanSir Dudley NorthWilliam Richard Morris, NuffieldAdolph S. OchsBertil OhlinScott Oki Frank Ward O'…