Cockroaches learn new tricks well in the evening, but they're lousy students in the morning.
A new study, published in the Proceedings of the National Academy of Sciences, showed that while cockroaches were able to pick up and remember lessons taught in the evenings, they might as well have stayed in bed during the morning hours.
Similar research performed on rodents suggested that the ability to learn and retain lessons is regulated by "biological clocks," which adjusts the body's alertness and hormone levels over a 24-hour cycle. One study even revealed that mice subjected to jet lag—a sudden disruption to the biological clock—were more likely to die.
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