공룡알 화석이 많이 발견되지 않는 이유
Why so few fossilized dinosaur eggs? Because many were squishy, not hard, study suggests
한글번역 : https://www.kosen21.org/info/globalNews/globalNewsDetail.do?articleSeq=NEWS_000000000000209
기사원문 : https://www.cbc.ca/news/canada/calgary/dino-egg-dinosaur-alberta-fossilized-1.5615799