Along with Pemex geologist Antonio Camargo, Penfield presented his results in 1981 at the Society of Exploration Geophysicists convention in Los Angeles. But the discovery didn’t get a lot of attention. Most people who were listening were still unaware of the impact hypothesis for the K-Pg extinction so no one at the time envisioned such a connection.
And yet, a year later this is the premise for an episode of Doctor Who.
