Article at http://blog.wired.com/wiredscience/2008/04/texans-build-wo.html
Scientists at UT/Austin, with help from the National Nuclear Security Administration, have built a petawatt laser (1*10^15 watts) which they intend to ramp up to about 1.5 petawatts. They report that is enough power to simulate the inside of a supernova, and they can maintain it for a few femtoseconds.
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