How to get a crying baby to sleep, according to science.

Carrying and then sitting with a tearful baby can help lull them into a deep sleep, tests show.
Getting a crying baby to sleep is hard, but science might have one answer to the problem.
It’s a frustration many parents know all too well: You’ve finally lulled your crying baby to sleep, so you put them down in their crib … and the wailing begins again. Science may have a trick for you.