Whereas human eyes contain three types of colour-detecting cells ... Excellent vision from four pairs of eyes helps these spiders hunt. When they spot potential prey, they pounce. Their biggest pair ...

The team used the funnel-web spider Tegenaria pagana and studied its entire embryonic development from fertilization to hatching to look at the gene expression involved in eye development.

it becomes possible to literally see exactly where the spider is looking at any given moment. This is similar in some ways to how eye tracking is done for humans, which also uses IR, but watches ...