65 MILLION YEARS AGO
In recent years, several other craters of around the same age as Chicxulub (The massive impact that killed the dinos) have been discovered, all between latitudes 20°N and 70°N. Examples include the Silverpit crater in Britain's North Seaand the Boltysh crater in Ukraine. Both are much smaller than Chicxulub, but likely to have been caused by objects many tens of metres across striking the Earth. This has led to the hypothesis that the Chicxulub impact may have been only one of several impacts that happened nearly at the same time. Another possible crater thought to have been formed at the same time is the Shiva crater, though the structure's status as a crater is contested.