asteroid | East Coast Main Line | West Coast Main Line | Asteroid belt | Main | Offenbach am Main | Great Central Main Line | Sun Belt Conference | Main (river) | Asteroid | Midland Main Line | Main Street | Rhein-Main-Verkehrsverbund | main battle tank | Brighton Main Line | Spanish Main | Main South Line | Main Southern railway line, New South Wales | Rhine-Main S-Bahn | Main Western railway line, New South Wales | Communist Party of Spain (main) | Amor asteroid | State and Main | South Wales Main Line | Rhein-Main Air Base | Metropolitan Green Belt | Main Central Road | Hochheim am Main | Central Belt | Borscht Belt |
In 2007, Bottke published a paper in Nature (with David Vokrouhlicky and David Nesvorny), proposing that the asteroid that produced the Chicxulub Crater and caused the Cretaceous mass extinction (although the latter is still contended) formed during an asteroid breakup in the main asteroid belt approximately 160 million years ago.