Closeup of the bright blue blooms of a mophead hydrangea - Kenwiedemann/Getty Images Hydrangeas are as fascinating as they are beautiful. The blooms of certain varieties act as a litmus test of the ...

More recently, the flap over this month's viral "every vacation home is now for sale" screenshot (which still hasn't completely died down) provoked still more potshots about the ocean's color, ...

Imagine if there were inexpensive 3D-printed sensors that changed color to show us if something had gotten too warm or was subjected to too much stress. Well, there soon could be – and they'll ...