In the rainforest in the Philippines, scientists laid out a tiny racetrack, just for skinks.
The racetrack and the high speed cameras surrounding it were part of research into a mysterious state of affairs. Skinks are lizards, but some species have lost their limbs over eons of evolution, giving them a snakelike look. However, other skinks whose ancestors jettisoned limbs have, for reasons still unknown, brought them back. They break an old rule of thumb in evolutionary biology, which holds that if you lose a complicated structure, you are unlikely to evolve it back.
Now, the researchers behind the racetrack