One million dollar Rex – short for robotic exoskeletons – was built using the most advanced artificial limbs and organs from across the world. And he shows that from bionic arms and legs to artificial organs, science is beginning to catch up with science fiction in the race to replace body parts with man-made alternatives.

Turns out it wasn't the doing of aliens who'd overshot a Nebraska cornfield or out-of-work art students with scuba gear. No, it was a masterwork by an amorous and talented male Takifugu rubripes, the poisonous pufferfish eaten by only the bravest sushi connoisseurs. Yoji found a series of small male fish working tirelessly, day in and night out, to craft these mate-attracting marvels using a single fin.