Editing 2000 in science (section)

==Physics==
*May 1 – A new class of [[Negative index metamaterials#Physical properties never before produced in nature|composite material]] is fabricated, which has a combination of [[physical property|physical properties]] never before seen in a [[natural material|natural]] or human-made material.<ref name=comp>{{cite journal |doi=10.1103/PhysRevLett.84.4184 |pmid=10990641 |title=Composite Medium with Simultaneously Negative Permeability and Permittivity |first5=S |last5=Schultz |first4=SC |last4=Nemat-Nasser |first3=DC |last3=Vier |first2=WJ |year=2000 |last2=Padilla |last1=Smith |first1=D. R. |journal=Physical Review Letters |volume=84 |issue=18 |pages=4184–7 |bibcode=2000PhRvL..84.4184S |doi-access=free| issn=0031-9007}}</ref><ref name="UCSD-press-release">{{cite web |author=McDonald, Kim |title=UCSD Physicists Develop a New Class of Composite Material with 'Reverse' Physical Properties Never Before Seen |url=http://ucsdnews.ucsd.edu/newsrel/science/mccomposite.htm |publisher=UCSD Science and Engineering |date=March 21, 2000 |access-date=December 17, 2010 |archive-date=June 11, 2011 |archive-url=https://web.archive.org/web/20110611235821/http://ucsdnews.ucsd.edu/newsrel/science/mccomposite.htm |url-status=live }}</ref>