- If male fertility declines further, there will be smaller testicles.
- Our most used extremities will change dramatically. Arms and fingers get longer to reduce the need to reach too far and nerve endings in hands and fingers will increase because of the greater use of devices such as iPhones that need complex eye-hand coordination.
- We’ll have smaller brains, maybe because so much memorising and thinking is done by our computers. “Science fiction images show humans of the future with huge brains but big brains are not necessarily the best,” says Chris Stringer, from the Natural History Museum.
- Dentist Dr Stemmer also thinks there could be fewer teeth as softer food needs less chewing and biting. He says: “We could even get our nutrition from liquids or pills in the future, which could mean less teeth and receded jaws.”