Sleeping reptiles show brain patterns resembling sleep cycles in mammals and birds. Sleep cycles When we leave the day behind us and nestle ourselves in our cosy beds, we sleep. Sleep, however, comes in stages that repeat themselves. It’s a five-stage cycle that last about 90 minutes in humans. Four stages of non-REM sleep areREAD MORE
Researchers are working hard to expand the alphabet of life by adding new bases to DNA.READ MORE
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