Some insects, like certain species of stick insects, can reproduce asexually through parthenogenesis, meaning females can produce offspring without fertilization from a male. elaborate
Exposure to even dim light at night can significantly suppress melatonin production, disrupting your natural sleep-wake cycle. elaborate
Your brain produces enough electricity to power a small lightbulb. elaborate
Bird feathers, initially evolved for insulation (their original function), were later exapted for flight. elaborate