Snow Science: Crystal Clues to Climate Change, Watersheds

Capturing snowflakes isn't as easy as sticking out your tongue. At least not when you're trying to capture them for scientific study, which involves isolating the tiniest of crystals on a metal card printed with grid lines and quickly placing them under a microscope to be photographed. "They are very tiny and they are close to the melting point," Marco Tedesco of Columbia University said as he set up his microscope beside a snowy field. "So as soon as they fall,...

© La Voix de l'Amérique - vendredi 16 mars 2018