Page 104 - (DK) I Can’t Believe It! 2

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FAST FACTS

Large eyes give animals the brightest, Tarsier brain and eye
sharpest vision possible. Tarsiers have relative sizes
some of the largest eyes relative to
their body size. They need them to hunt
for insects in the rain forest at night.
Each of their eyes is as big as
their brain! A human’s eyes are Human brain and eye
proportionally much smaller. relative sizes

What has the

biggest eyes?

The colossal squid, a little-known

species of squid bigger than the
giant squid, has eyes up to
11 in (27 cm) across in the

few individuals measured.

PREHISTORIC VISION

Extinct reptiles called ichthyosaurs Human eyeball
1 in (2.5 cm)
had eyes up to 12 in (30 cm) across
across. Like huge squid species,
some probably hunted in the deep
sea, their big eyes helping them
to see in the dim light. Horse eyeball 1½ in
(4 cm) across

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