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It is thought that the Earth was once an ice-covered “snowball.” How did this harsh environment affect the evolution of life?
Many sea creatures have the ability to emit light. How do they do this and for what purpose? Here we explain these peculiar luminescent abilities.
The butterfly has a compound eye composed of many facets. Illuminating light on this eye revealed that there are three kinds of colors in the beautiful reflecting light. How is it that the butterfly perceives a much more complex and richly colored world?
