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" ... By examining meteor craters, tektites, lunar surface samples, and fused sand and soil called fulgurites left behind by lightning strikes, they suggest that scientists could discover more new quasicrystals and start to understand more about how they form. ... "
" ... While remains from this asteroid impact 800,000 years ago have been found previously, scientists haven't been able to zone in on the location of the impact. Tektites have been found across Asia, Australia and as far away as Antarctica. The size distribution of the tektites was used to determine the impact was in Southeast Asia, perhaps near Thailand. The assumption is that larger tektites, which were found to weigh up to 20 kilograms, would be closer to the asteroid impact site. ... "