Nature Magazine – November 16, 2023: The latest issue cover features how echinoderms such as starfish and sea urchins have evolved five-fold symmetry, with five limbs radiating from a central mouth.

One brain area helps you to enjoy a joke — but another helps you to get it

Seinfeld episodes help scientists to distinguish between the brain regions involved in understanding and appreciating humour.

Spinal implant helps man with advanced Parkinson’s to walk without falling

Electrical stimulation improved his mobility, although researchers say that a larger study is needed to assess the device.

Manatees and conservation: how I protect these massive, vulnerable animals

Nataly Castelblanco Martínez works to raise awareness of the perils faced by the much-loved marine mammals.