500millionyearold
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A 500-million-year-old brain “radar” still shapes how you see
The brain’s ability to interpret the visual world does not depend solely on its advanced outer layer, the cortex. A new study in PLOS Biology reveals that an evolutionarily older brain region, the superior colliculus, contains neural networks capable of carrying out fundamental visual computations. These circuits enable the brain to separate objects from their backgrounds and identify which visual…
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500-million-year-old “squid” were actually ferocious worms
Remarkable fossils found in North Greenland have helped researchers solve a 500-million-year-old puzzle surrounding squid-like ancestors. It was previously thought ancient organisms called nectocaridids, which bear a resemblance to squid, were a type of cephalopod – marine molluscs with tentacles and a prominent head. But scientists, co-led by the University of Bristol, have now shown these creatures are actually an…
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