Read on to learn about strange seashore phenomena, from cannibalistic shark embryos to worms whose butts become autonomous sex machines.
Dogs and people with Williams syndrome may both owe their sociable personalities to changes in the same genes.
Analysis of dinosaur fossils showed that some parents warmed their eggs with body heat.
White-tailed deer mothers deposit their babies with female mule deer, which then defend the fawns from predators.
Tube-lipped wrasses overcome coral's defenses with bizarre puckered lips.