'Tis the Season! 12 Days of Christmas with Citizen Science

Photo: John Ohab 12 Days of Christmas The holiday season is upon us! In the spirit of the season, we've put together another edition of our ever popular annual 12 Days of Christmas Newsletter. Cheers! The SciStarter Team On the 1st Day of Christmas, Treezilla gave to me: A measuring tape around a pear tree, as I meas