Paintings can be a window to more than the outmoded dress and strange customs of the past — sometimes, they have modern-day science lessons to impart, too. That's the case with Giovanni Stanchi’s 17th century still life of fruit, as Phil Edwards points out for Vox — just look for the watermelons. Stanchi’s work, painted between 1645 and 1672 (and now up for auction at Christie’s), includes strange watermelons that look so foreign they could be from outer space in the bottom right corner. If watermelons looked like that in the Renaissance, then why do they look so different today?...