Chicxulub Crater
Idetifies the 180 mile wide Chicxulub crater in Mexico, and propose it as being the most likely candidate for the catastrophic environmental changes that killed off 70% of all species around 65 million years ago
Historical biography archive · Updated 2026-11-03
Alan Hildebrand Biography and Timeline
Follow Alan Hildebrand through 1 dated historical records for United States of America.
Alan Hildebrand, historical timeline
A chronological timeline drawn from matching World History Database records.
1Distinct records
1 of 1Page
1990–1990Years on this page
1990
Records, sources and methodology
These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.