Science seeks ways to take sting out of sunburn

WASHINGTON — If you’ve hit the beach, chances are you’ve expe­ri­enced an unfor­tu­nate rite of sum­mer: The sun­burn. Skin so swollen it hurts to bend. The heat that rises from red­dened shoul­ders. The “ow, ow, ow” from the shower after you’d thought the pain had faded.