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Meteorite
A meteorite is a small
extraterrestrial body that
impacts the Earth's surface.
While in space they are
called meteoroids, and while
falling through Earth's
atmosphere they are called
meteors. These are small
... > full story
Impact crater
An impact crater is a
circular depression on a
surface, usually referring
to a planet, moon, asteroid,
or other celestial body,
caused by a collision of a
smaller body (meteor) with
the surface. ... > full story
Impact event
Impact events are caused by
the collision of large
meteoroids, asteroids or
comets (generically:
bolides) with Earth and may
sometimes be followed by
mass extinctions of life. ... > full story
Chicxulub Crater
Chicxulub Crater is an
ancient impact crater buried
underneath the Yucatan
peninsula, with its center
located approximately
underneath the town of
Chicxulub, Yucatan, Mexico.
Investigations suggest that
... > full story
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Tunguska event
The Tunguska event was an explosion that occurred at 60 degrees 55'N 101degrees 57'E, near the Podkamennaya (Under Rock) Tunguska River, in what is now Evenk Autonomous Okrug, at 7:17 AM on June 30, ... > more -
Extinction event
An extinction event (also extinction-level event, ELE) occurs when a large number of species die out in a relatively short period of time. Since life began on Earth, a number of major mass ... > more -
Volcanic cone
Volcanic cones are among the simplest volcano formations. They are built by fragments (called ejecta) thrown up (ejected) from a volcanic vent, piling up around the vent in the shape of a cone with a ... > more -
Gulf of Mexico
The Gulf of Mexico is a major body of water bordered and nearly landlocked by North America. Because of the ever increasing amount of nitrogen and phosphates dissolved in the waters of the Gulf of ... > more -
End of civilization
The end of civilization or the end of the world are phrases used in reference to human extinction scenarios, doomsday events, and related hazards which occur on a global ... > more -
Yellowstone Caldera
The Yellowstone Caldera, sometimes known as the Yellowstone supervolcano, is a volcanically active region in Yellowstone National Park. It measures 55 kilometers (34 mi) by 72 kilometers (44 mi). ... > more -
Crust (geology)
In geology, a crust is the outermost layer of a planet. The crust of the Earth is composed of a great variety of igneous, metamorphic, and sedimentary rocks. The crust is underlain by the mantle. ... > more
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