This would make it a language family about as old as Indo-European ( 4000 to 7, 000 BC according to several hypotheses cited in Mallory 1997: 106 ) but considerably younger than Afroasiatic ( c. 10, 000 BC according to Diakonoff 1988: 33n, 11, 000 to 16, 000 BC according to Ehret 2002: 35 – 36 ).

Medical Hypotheses, 1997 ; 49: 303 – 306.

* 1912 – Frank Dilio, Canadian hockey administrator ( d. 1997 )

* 1908 – Frank Robert Miller, Canadian airman and politician ( d. 1997 )

* 1997 – Korean Air Flight 801, a Boeing 747-300, crashes into the jungle on Guam on approach to airport, killing 228.

* 1908 – Helen Jacobs, American tennis player ( d. 1997 )

* 1917 – Robert Mitchum, American actor ( d. 1997 )

* 1912 – Ben Hogan, American golfer ( d. 1997 )

After re-establishing its credibility in 1989, Australia underlined its superiority with victories in the 1990 – 91, 1993, 1994 – 95, 1997, 1998 – 99, 2001 and 2002 – 03 series, all by convincing margins.

Ashes series have generally been played over five Test matches, although there have been four-match series ( 1938 ; 1975 ) and six-match series ( 1970 – 71 ; 1974 – 75 ; 1978 – 79 ; 1981 ; 1985 ; 1989 ; 1993 and 1997 ).

* 1920 – Louis Pauwels, French journalist and writer ( d. 1997 )

* 1997 – Norman Carr, British conservationist ( b. 1912 )

* 1997 – Oued El-Had and Mezouara massacre in Algeria ; a total of 116 villagers killed, 40 in Oued El-Had and 76 in Mezouara.

* 1935 – Georgy Shonin, Soviet astronaut ( d. 1997 )

* 1997 – Pietro Rizzuto, Canadian politician ( b. 1934 )

* 1920 – Jimmy Witherspoon, American singer ( d. 1997 )

* 1930 – Terry Nation, Welsh novelist and screenwriter ( d. 1997 )

* 1912 – Catherine Scorsese, Italian-American actress ( d. 1997 )

* 1915 – Gerard McLarnon, Irish playwright ( d. 1997 )

In 1997, a team of researchers led by John Gustafson from Ames Laboratory ( located on the Iowa State campus ) finished building a working replica of the Atanasoff – Berry Computer at a cost of $ 350, 000.

In 1997 ICI acquired National Starch & Chemical, Quest, Unichema, and Crosfield, the specialty chemicals businesses of Unilever for $ 8bn.

As chemical weapons, they are classified as weapons of mass destruction by the United Nations according to UN Resolution 687 ( passed in April 1991 ) and their production and stockpiling was outlawed by the Chemical Weapons Convention of 1993 ; the Chemical Weapons Convention officially took effect on April 29, 1997.

( 1997 ) Chemical Kinetics, Third Edition, Benjamin-Cummings

* Chemical Weapons Convention, signed 1993, entered into force 1997

In the spring and summer of 1997, the National Security Council became occupied with such issues as the ratification of the Chemical Weapons Treaty, NATO enlargement, the Middle East peace process, the U. S .- Russian Summit at Helsinki, and the Denver Economic Summit.

Around the mid-1990s, with the success of the big beat-sound exemplified by The Chemical Brothers and The Prodigy in the UK, and spurred by the attention from mainstream artists, including Madonna in her collaboration with William Orbit on her album Ray of Light and Australian singer Dannii Minogue with her 1997 album Girl, music of this period began to be produced with a higher budget, increased technical quality, and with more layers than most other forms of dance music, since it was backed by major record labels and MTV as the " next big thing ".

Under both the 1972 Biological Weapons Convention and the 1997 Chemical Weapons Convention, ricin is listed as a schedule 1 controlled substance.

In 1997 the Hall – Héroult process was designated an ACS National Historical Chemical Landmark in recognition of the importance of the commercialization of aluminium .< ref >

* 1997: Dig Your Own Hole by The Chemical Brothers, vocals on " Setting Sun "

In 1997 Unilever sold the speciality chemicals businesses National Starch & Chemical, Quest, Unichema and Crosfield to ICI for US $ 8 billion.

Over the ten years of weekly Saturday nights at Nation, the club played host to many international DJ superstars, including Paul Oakenfold ( who was resident DJ throughout 1997 and 1998 ), Paul van Dyk, Carl Cox, Sasha, Roger Sanchez, Graeme Park, Andy Weatherall plus early exclusive DJ sets from The Chemical Brothers.

McGee returned to making music in 1997, collaborating with Ed Ball under the name The Chemical Pilot, releasing the album Journey to the Centre of the Mind in 1998.

The American Chemical Society honoured Peter Armbruster 1997 as one of few non-Americans with the ' Nuclear Chemistry Award '.

Dig Your Own Hole is the second studio album by British electronica duo The Chemical Brothers, released on 7 April 1997.

In 1997 the production of aluminum metal by electrochemistry discovered by Hall was designated an ACS National Historical Chemical Landmark.

China has acceded to the Biological and Toxin Weapons Convention ( BWC ) in 1984 and ratified the Chemical Weapons Convention ( CWC ) in 1997.

* R. A. Mashelkar ( 1997 ) Chemical Engineering Science 24 4437-4438 ," Professor M. M. Sharma "

* Peter M. Schuster: From Curiosity to Passion: Loschmidt's Route from Philosophy to Natural Science, in: W. Fleischhacker and T. Schönfeld ( Editors ): Pioneering Ideas for the Physical and Chemical Sciences, Proceedings of the Josef Loschmidt Symposium, held in Vienna, Austria, June 25 – 27, 1995 ; Plenum Press, 1997, New York.

She received the 1997 Perkin Medal from the American Chemical Society, and a 1980 award from the ACS for " Creative Invention ".

He has received many prizes, among which the APS Irving Langmuir Prize for Chemical Physics ( 2003 ), the AVS Medard W. Welch Award for Surface Science ( 1997 ), the Julius Springer Prize for Applied Physics ( 2008 ) and the Richard Feynman Prize ( 1999 ).

The Chemical Sciences Building opened in 1997, a state-of-the-art Recreation and Fitness Center opened in 2001, and the Homer L. Hitt Alumni and Visitors Center ( named for UNO's founding Chancellor ) opened in 2003.

In 1997, S. C. Johnson expanded its roster of consumer brands when it purchased Dow Chemical's DowBrands division, which included Ziploc, Saran, Fantastik, Glass Plus, Scrubbing Bubbles, and Spray ' n Wash. Dow Chemical purchased Texize in 1986, in which it received the Fantastik and Glass Plus brand.

According to the congressional testimony of Gary Milhollin of the Wisconsin Project on Nuclear Arms Control in 1997, Norinco subsidiaries in the U. S. include: Beta Chemical, Beta First, Beta Lighting, Beta Unitex, China Sports ( California ), Forte Lighting, Larin, NIC International ( New Jersey ).