Summary:

- The article discusses a study that has mapped a dramatic 100-million-year explosion in animal color signals, which occurred during the Cretaceous period.
- Researchers analyzed the evolution of color signals in more than 200 species of insects, spiders, and other arthropods, and found that there was a significant increase in the diversity and complexity of color signals during this time period.
- The study suggests that this explosion in color signals was likely driven by the evolution of new visual systems and the diversification of predator-prey interactions, as well as the development of new communication strategies among animals.