While reams of soppy poetry, plays, and love songs might beg to differ, scientists are always keen to point out that love is felt not in the heart - but in the brain.

Be Clever. Be Current. Be Mine. The sweet messages on those valentine hearts require careful planning and editing from year to year. And they speak volumes about the state of our lives and loves.

Starting February 11, heart-shaped one-topping pizzas return to Pizza Hut to spread the love for Valentine’s Day, a positive contrast to last year’s theme where the pizza chain offered limited ...