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Ancient Rome
Ancient Rome was a civilization that grew out of the city-state of Rome, founded on the Italian peninsula around 800 BC. During its twelve-century existence, the Roman civilization shifted from a ... > more -
Sequence stratigraphy
Sequence stratigraphy is a relatively new branch of geology that attempts to link prehistoric sea-level changes to sedimentary deposits. The 'sequence' part of the name refers to cyclic sedimentary ... > more -
Horseshoe crab
The horseshoe crab (Limulus polyphemus) is an arthropod that is more closely related to spiders than crabs. Horseshoe crabs possess the rare ability to regrow limbs lost. Limulus has been extensively ... > more -
Tutankhamun
Nebkheperre Tutankhamun (alternate transcription Tutankhamen), named Tutankhaten early in his life, was Pharaoh of the Eighteenth dynasty of Egypt (ruled 1334 BC - 1325 BC), during the period of ... > more -
Global warming
Global warming refers to the increase in the average temperature of the Earth's near-surface air and oceans in recent decades and its projected continuation. The global average air temperature ... > more -
Chichen Itza
Chichen Itza is a large pre-Columbian archaeological site built by the Maya civilization, located in the northern center of the Yucatán Peninsula, present-day Mexico. From roughly 600 CE in ... > more -
Tyrannosaurus
Tyrannosaurus is a genus of tyrannosaurid theropod dinosaur. The species Tyrannosaurus rex, commonly abbreviated to T.rex was one of the largest land carnivores of all time. It hails from what is now ... > more
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