However, the horny turtles aren’t in the exact same sex positions that they were when they died – rather than one atop the other, as is usual, they’re facing away from each other, as though they’ve both suddenly changed their minds.

Sensing my bafflement, Vinther leans back in his chair and, with the air of someone for whom prehistoric sex is a perfectly normal conversation topic, explains that after the turtles died, they would have drifted apart but remained attached by their genitals. They’ve been locked together all this time by the male partner’s, ahem, reproductive anatomy.

And this leads us back to the pair of fossilised tyrannosaurs, where there are some uncanny parallels. “They’re pointing away from each other, and their tails overlap each other,” says Vinther. “I believe that they were caught in the act.”