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MMXIII) was a
starting on Tuesday (
dominical letter F) of the
Gregorian calendar, the 2013th year of the
Common Era (CE) and
Anno Domini (AD) designations, the 13th year of the
3rd millennium, the 13th year of the
21st century, and the 4th year of the
2013 was designated as:
February 12 –
North Korea conducts its
third underground nuclear test, prompting
widespread condemnation and tightened economic sanctions from the international community.
February 15 – A
meteor explodes over the Russian city of
Chelyabinsk, injuring 1,489-1,492 people and damaging over 4,300 buildings. It is the most powerful meteor to strike Earth's atmosphere
in over a century.
 The incident, along with a coincidental
flyby of a larger asteroid, prompts international concern regarding the vulnerability of the planet to meteor strikes.
February 21 – American scientists use a
3D printer to create a living lab-grown
collagen and animal ear cell cultures. In the future, it is hoped, similar ears could be grown to order as
transplants for human patients suffering from ear trauma or amputation.
February 28 –
pope, becoming the first to
do so since
Gregory XII in
1415, and the first to do so voluntarily since
Celestine V in
August 14 – Following the military coup in Egypt, two anti-coup camps are raided by the security forces leaving 2,600 dead.
 The raids were described by
Human Rights Watch as "one of the world’s largest killings of demonstrators in a single day in recent history”.
August 21 – 1,429 are killed in the
Ghouta chemical attack during the Syrian Civil War.