While these results are interesting, they are far from proving an impact extinction event. In addition to fullerenes in the KT boundary layer, we have an iridium anomaly, a global clay layer (containing microtektites), shocked quartz grains within the boundary clay, an instananeous extinction event (even 100,000 years, while short geologically, seems excessively protracted for species and familial extinctions), and -- best of all -- a 300 km diameter crater in the Yucatan (Chicxulub) whose impact melts date precisely from the KT boundary time (65 million years ago).
It took the community over a decade to believe the KT extinction was impact-induced. Although the next battle will be easier, the Permo-Triassic extinction has a long way to go yet.
the Permo-Triassic extinction The map of earth's surface looked a lot different 250 million years ago assuming the continental drift model. All the continents were joined together into one, apparently. Did something happen to cause them to start to break up and begin drifting to their present locations all over half the planet? The other half being the Pacific Ocean.