Quantum redactiones paginae "Astroblema Chicxulub" differant

* "[https://www.lpi.usra.edu/features/chicxulub/ International Consensus — Link Between Asteroid Impact and Mass Extinction Is Rock Solid]" (4 Martii 2010) apud ''Lunar and Planetary Institute''

* Bob Yirka, "[https://phys.org/news/2017-11-analysis-chicxulub-asteroid-struck-vulnerable.html New analysis of Chicxulub asteroid suggests it may have struck in vulnerable spot]" (10 Novembris 2017) apud ''Phys.org''