The AD 365 Crete earthquake was an undersea earthquake that occurred at about sunrise on 21 July 365http://astronomy.activeboard.com/t37172717/365-ad-crete-earthquake/On 21 July 365 AD, Alexandria was devastated by a tsunamihttp://en.wikipedia.org/wiki/Alexandria#HistoryThe Aswan High Dam, as-Sad al-'Aali, was completed on 21 July 1970http://en.wikipedia.org/wiki/Aswan_High_Dam#Construction_and_filling.2C_1960.E2.80.931976The Temple of Artemis was destroyed on July 21, 356 BChttp://astronomy.activeboard.com/t37172617/temple-of-artemis/
Mount Mayon in eruption on July 21, 1928http://en.wikipedia.org/wiki/Mayon_Volcano#mediaviewer/File:Mayon_1928_1.jpgMount Sanford, Alaska, was first climbed on July 21, 1938http://en.wikipedia.org/wiki/Mount_Sanford_(Alaska)#HistoryOn July 21, 1983, Antarctic station Vostok recorded a temperature of -89.2 °Chttp://en.wikipedia.org/wiki/Pole_of_Cold
Supercomputer Coates was installed at Purdue University on July 21, 2009.http://en.wikipedia.org/wiki/Coates_(supercomputer)The discovery of the tau neutrino was announced in July 2000http://en.wikipedia.org/wiki/Tau_neutrino
NS Savannah, the first nuclear-powered cargo-passenger ship, was launched on 21 July 1959http://en.wikipedia.org/wiki/NS_SavannahThe Phantom (1946) - McDonnell (XFD-1) FH-1 Phantom
Mercury-Redstone 4 was a Mercury program manned space mission launched on July 21, 1961http://astronomy.activeboard.com/t37151114/liberty-bell-7-spacecraft/The launch of Discoverer 27 occurred at 22:35 UTC on 21 July 1961http://en.wikipedia.org/wiki/Discoverer_27Mars 4 was launched on 21 July 1973 (attempted Mars orbit)http://en.wikipedia.org/wiki/Mars_4STS-135, the final mission of the American Space Shuttle program, landed on 21 July 2011http://en.wikipedia.org/wiki/STS-135
Gennady Ivanovich Padalka (born June 21, 1958) is a Russian Air Force officer and an RSA cosmonaut. http://en.wikipedia.org/wiki/Gennady_Padalka
Nigel Richard Wood, (1949 July 21 York) British engineer Payload Specialist 2 astronauthttp://astronomy.activeboard.com/t60572929/nigel-richard-wood/
Snooty (born July 21, 1948) is a male Florida manatee that resides in Bradenton, Florida.http://en.wikipedia.org/wiki/SnootyRobert Simpson Woodward (July 21, 1849 - June 29, 1924) was an American physicist http://en.wikipedia.org/wiki/Robert_Simpson_WoodwardJean-Felix Picard (July 21, 1620 - July 12, 1682) was a French astronomer and priesthttp://en.wikipedia.org/wiki/Jean_PicardMilan Rastislav tefánik (July 21, 1880 - May 4, 1919) was a Slovak politician, diplomat, and astronomer. http://en.wikipedia.org/wiki/Milan_Rastislav_Stefanik
The Amandla Festival of Unity was held at Harvard Stadium in Boston, Massachusetts, on July 21, 1979.http://en.wikipedia.org/wiki/Amandla_Festival
NGC 6772 was discovered by German-British astronomer William Herschel on the 21st July 1784.http://astronomy.activeboard.com/t58114219/ngc-6772/NGC 6920 was discovered by British astronomer John Herschel on the 21st July 1835. http://astronomy.activeboard.com/t58114216/ngc-6920/NGC 6926 was discovered by German-British astronomer William Herschel on the 21st July 1784.http://astronomy.activeboard.com/t58114211/ngc-6926/NGC 6929 was discovered by British astronomer John Herschel on the 21st July 1827. http://astronomy.activeboard.com/t58114207/ngc-6929/NGC 7001 was discovered by British astronomer John Herschel on the 21st July 1827. http://astronomy.activeboard.com/t58114206/ngc-7001/
ADS 94 B was discovered by William Herschel on July 21, 1781.http://en.wikipedia.org/wiki/Alpha_Andromedae#Optical_companionSubstellar object HAT-P-13c was discovered on the 21st July 2009http://en.wikipedia.org/wiki/HAT-P-13c
Jupiter moon Sinope, was discovered by Seth Nicholson in 1914http://en.wikipedia.org/wiki/Sinope_(moon)
A radioactive rock-like object fell in Woburn in 2007http://astronomy.activeboard.com/t12320196/woburn-meteorite/
MeteoritesThe Karloowala (L6 chondrite) meteorite fell in Punjab, Pakistan, on the 21st July 1955.http://astronomy.activeboard.com/t44013206/karloowala-meteorite/The Kilabo (LL6) meteorite fell in Jigawa, Nigeria, on the 21st July 2002.http://astronomy.activeboard.com/t54413612/kilabo-meteorite/The Thuathe (H4/5) meteorite fell in Berea, Lesotho, on the 21st July 2002.http://astronomy.activeboard.com/t54413659/thuathe-meteorite/