An extensively covered journal article by Sun et al. in Science Advances concludes that volcanoes — not a fragmenting comet — caused the Younger Dryas. Sun provides an invaluable trove of data, but less than 72 hours after the publication their interpretation is suffering.

Dr. Marc Defant did a great thing this morning by announcing on Twitter and his blog that he had come around to support the Younger Dryas Impact Hypothesis. As I told Marc, my respect for his intellectual integrity soared when I saw his tweet.

Michael Shermer, Founding Publisher of Skeptic Magazine, tweeted Graham Hancock an extraordinary note this week. Shermer announced that based on last week’s blockbuster Abu Hureyra paper he was persuaded to re-think his position on the Younger Dryas Impact Hypothesis. What a welcome development in the long effort to win the hearts and minds of persistent critics […]