Impact craterDeath from spaceOther dinosaur extinction theoriesAbout 65 million years ago, at the end of the Cretaceous Period, the Earth was affected by major changes to its environment. Animal…
WHAT IS A NERVE? HOW DO NEURONS WORK? ARE ALL NEURONS THE SAME? WHAT IS A REFLEX ACTION? FIND OUT MOREThe brain, nerves, and spinal cord make up the nervous system. It processes information from the…
The following table lists the worst floods, landslides, avalanches, tidal waves and mudslides in history.
1228 Holland: 100,000 people reputedly drowned by sea flood in Friesland.
1642 China…
WHAT ARE BACTERIA AND VIRUSES? WHAT ARE GENETIC DISEASES? WHY DO SOME PEOPLE SUFFER FROM ALLERGIES? WHAT IS CANCER? MEDICINEFIND OUT MOREAnything that damages the body or how it works can be called…
Director Chris Weitz turns up the heat in the second Twilight film by Catherine McNiff Related Links New Moon TriviaNew Moon QuizTwilight PollTwilight HangmanTwilight PageHere comes the…
(Encyclopedia)
CE5
Worldwide pattern of earthquake activity: The dots indicate the epicenters of all earthquakes recorded during a recent 10-year period.
CE5
earthquake, trembling or shaking…
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The global spread of the First and Second World Wars made them the two most notable events of the 20th century. But they were far from the only major conflicts.
Large-scale military…
(Encyclopedia) radiation sickness, harmful effect produced on body tissues by exposure to radioactive substances. The biological action of radiation is not fully understood, but it is believed that a…
It's a Long Way DownAnatomy and PhysiologyThe Digestive SystemStops Along the WayIt's a Long Way DownJack-of-All-TradesRunning Along the TractPancreatic Panacea?What We Do with Our Food The…
