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www.nationalgeographic.com/news/2013/2/130214-biggest-asteroid-impacts...

The asteroid 2012 DA14 will narrowly miss Earth this Friday, but meteorites have been hitting Earth for billions of years. ... which mark the largest asteroid impacts. ...

en.wikipedia.org/wiki/List_of_impact_craters_on_Earth

This list of impact craters on Earth contains a selection of the 190 confirmed craters given in the Earth Impact Database. To keep the lists manageable, only the largest craters within a time period are included. The complete list is divided into separate articles by geographical region.

en.wikipedia.org/wiki/Impact_event

Due to Earth's escape velocity, the minimum impact velocity is 11 km/s with asteroid impacts averaging around 17 km/s on the Earth. The most probable impact angle is 45 degrees. Impact conditions such as asteroid size and speed, but also density and impact angle determine the kinetic energy released in an impact event.

www.livescience.com/45126-biggest-impact-crater-earth-countdown.html

Crash! 10 Biggest Impact Craters on Earth. ... but the same deadly asteroids might also have delivered the seeds of life soon after Earth was born. The effects of asteroid impacts linger for ...

education.seattlepi.com/long-term-effects-asteroid-impact-earth-4601.html

One way in which asteroid impacts have literally shaped Earth is through the resulting craters from large objects crashing into the crust. For instance, the Vredefort Dome in South Africa is the largest verified impact crater on Earth, estimated to be 300 kilometers wide when it was originally created.

www.businessinsider.in/the-last-major-asteroid-to-hit-earth-destroyed-500...

The last major asteroid to hit Earth destroyed 500 square kilometers — and it could have been much worse. ... The effects of the asteroid ranged from broken spines to ultra violet burns on their ...

everseenitem.blogspot.com/2012/11/major-asteroid-impacts-on-earth.html

It is one of the most famous modern asteroid impacts, mostly because it caused a poop-load of destruction and scarred the area for a while… basically nature’s way of saying “asteroids are supposed to suck.” Anyway, at exactly 7:14 on June 30 th, the shrapnel of an asteroid that broke up in the atmosphere made its way to Earth. The size ...

whyfiles.org/106asteroid/2.html

In the course of presenting results of the computer simulation on asteroid impacts, Peiser adds, "If it can happen in front of your nose -- practically in your backyard -- it can also happen on Earth." 1998 -- Astronomers announce that an asteroid may be on a collision course for Earth. The warning is quickly withdrawn after further observations.

thenextweb.com/.../nasa-head-warns-expect-a-major-asteroid-impact-in-your-lifetime

NASA administrator Jim Bridenstine thinks it’s time to start taking the threat of an Earth-altering asteroid impact seriously. In a speech today at the International Academy of Astronautics ...

www.cnet.com/news/nasa-head-expect-a-major-asteroid-strike-in-your-lifetime

NASA head: Expect a major asteroid strike in your lifetime. Visions of space rocks slamming into Earth aren't just for dinosaurs and Hollywood movies.