It shows babies born in April are, on average, 2.2 millimetres taller than December children. And if birthdate affects the bones, why shouldn’t it shape the brain too? The study involved more than a million babies over 20 years, which looks like solid scientific proof to me. Not that most sceptics are troubled by anything as trivial as proof, of course!

Here’s another weird synchronicity: what is it about January 20 which points new babies towards space?

All four of today’s birthday boys pictured have strong links to the Final Frontier.

DeForest Kelly was Bones in the original Star Trek.
Edwin ‘Buzz’ Aldrin was the second man on the moon.
Tom Baker was the greatest Dr Who of all; and Paul Stanley, whose character in the rock band Kiss is The StarChild