Bill Gates recently posted this infograph in his blog. Most published data suggests that shark attack deaths are actually usually far lower than 10 per year, while non-fatal attacks usually come in somewhere at between 50-75 per year. Maybe we should shift our attention from the dangers of going swimming to eradicating malaria instead.
Mantis shrimp have the world’s best eyes – but why?
Mantis shrimp have compound eyes that are made up of tens of thousands of ommatidia. These remarkable creatures have up to 16 photoreceptors and they can see UV, visible and polarised light. Amazingly, they are the only animals that can detect “circularly polarised light”, which is the circular rotating wave component of light. Mantis shrimp can also perceive depth with only one eye and each of their eyes can move independently. The vision capabilities of a mantis shrimp are utterly impossible for humans to imagine, but the things they can se must be incredible. (read more)