The future is now!

"Quando as galinhas tiverem dentes" já não serve para indicar um tempo futuro hipotéticamente "existível" porque já o é agora:

Scientists have discovered that rarest of things: a chicken with teeth – crocodile teeth to be precise. Contrary to the well-known phrase, 'As rare as hens' teeth,' the researchers say they have found a naturally occurring mutant chicken called Talpid that has a complete set of ivories. The team, based at the Universities of Manchester and Wisconsin, have also managed to induce teeth growth in normal chickens – activating genes that have lain dormant for 80 million years.