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How Cats Took Over the World

—By Christine Frantz That kitty sitting on your lap can now boast of her own family history. A research team, lead by Warren E. Johnson of the National Cancer Institute, studied the DNA of 37…

How long could a dinosaur live?

Animal lifespans relate in part to their body size and in part to their type of metabolism. Dinosaur lifespans probably varied in length from tens of years to hundreds of years. Their possible…

Plant Kingdom

(or Plantae ) Virtually all other living creatures depend on plants to survive. Through photosynthesis, plants convert energy from sunlight into…

How fast could dinosaurs walk or run?

Estimates of dinosaur speeds vary because several different methods are used to calculate them. One recent estimate suggests that an average person might have been able to to outrun an adult…

Hamsters

Hamsters How to Care for Hamsters Hamsters were living in relative obscurity until just 70 years ago, when a zoologist discovered a family of these rodents in the Syrian desert. Today,…

The Bulldog Ant

An Australian hunter with excellent vision and a venomous sting by Catherine McNiff By Doug Beckers (Flickr) Related Links Bulldog…

DK Science: Evolution

SPECIALIZED FOR SURVIVALDUNKLEOSTEUSEVOLUTION OF THE ELEPHANTNATURAL SELECTIONADAPTATIONFIND OUT MOREThe process by which changes occur in living things over time is known as evolution. The…

DK Science: Conservation

RECREATING THE QUAGGABIODIVERSITYFIND OUT MOREWildlife conservation is becoming increasingly important. Not many animals can evolve quickly enough to survive human-induced change, and few…

Infoplease Spotlight

Bringing home your new cat What Next? Congratulations! You are the proud new owner of a cat. No doubt you're looking forward to years of happy companionship. But what do you do now? The…