To make use of the MMPs, Dr. Tsien attaches his fluorescent dye, along with some positive charges, to one side of a small hairpin-shaped protein molecule.
The artists were highly skilled at using, or even enhancing, the natural shape of the cave walls to give depth and perspectives to their drawings, the sense of motion and vitality in these animals.
To that end the Hubble Space Telescope often proves handy for discovering celestial objects shaped like everything from a sea horse, the letter X, tadpoles and flying saucers.
Then they dissolve into nothing, only to form as if by stealth on a different horizon, dancing across the sky in the shape of a sea horse or crescent moon.
We can love the look but, in an online environment, we cannot feel the quality of a texture, the shape of the fit, the fall of a fold or the weight of an earring.