Creative Commons/Keith Weller/USDA

Sleepy cows make sleep-inducing milk

Your mom may have been right all along—a glass of warm milk could actually help you get to sleep, reports The Wall Street Journal. But not just any milk. Scientists writing in the Journal of Medicinal Food found that cow milk produced at night calmed mice and put them to sleep faster than milk produced during the day. The so-called “night milk” contains higher levels of tryptophan and melatonin, chemicals in the body that induce sleepiness.