Laser hearing, chatty females, clean energy...

The cochlear implant that uses infrared laser light for more complex hearing, clean energy from ocean thermal energy conversion (OTEC), how woolly mammoth DNA found in the permafrost is a mammoth step towards recreating extinct species, why social vocalisation replaces grooming in society, how early photon tomography (EPT) provides a safer way to image biological tissues and findings that how the brain categorises colours changes when we develop language. Plus, in 'Stuff and Non-Science', do cats always land on their feet?