"We have two different species (Hawksbill and Olive Ridley) hatching in Perancak Beach, " said Ketut Putra of the WWF.

CNN: Turtle eaters develop taste for conservation

Scientists studying cancer in two very different animal species, Tasmanian devils and dogs say they found evidence that some cancer cells are being passed between animals through physical contact, like sex or biting.

NPR: Startling New Evidence Cancer Is Contagious

Half of the gestures Dr Pollick and Dr de Waal regularly observed seemed to have completely different meanings in the two species.

ECONOMIST: Evidence that the first words were movements, not sounds

They also said they were able to differentiate between two species of bacteria and two different strains of the same P. aeruginosa bacterium.

BBC: Lung infection identified using 'breath-print'

Darwin showed in detail how life changes over the course of time by the process of natural selection, but failed to explain how those changes can take different courses, dividing a species in two and thus multiplying the number of species.

ECONOMIST: Evolution