The risks of an armed conflict are growing in Eastern Europe as Russia, the United States and others engage in a tug of war over the future of Ukraine.
A new study shows when preschoolers are exposed to even dim light in the hour before bedtime it can significantly lower levels of the sleep-promoting hormone melatonin, potentially disrupting sleep. The research serves as a reminder to parents to turn off electronics and dim the lights to promote healthy sleep in children.
In work that has implications for the search for life elsewhere in the galaxy, scientists analyze data from 440 stellar flares and find them to be not just common and powerful, but also more complex than previously thought