Contents

21 February 2020
Vol 367, Issue 6480

About The Cover

Cover image expansion

COVER American witch hazel (Hamamelis virginiana) flowers encased in ice from a late winter storm. The effects of climate change on biological systems may be especially pronounced in winter. The Gordon Research Conference on the Biology of Winter will be held from 21 to 26 June 2020 in Waterville Valley, New Hampshire. See page 922 for the Gordon Research Conference schedule and preliminary programs.
Photo: Brent J. Sinclair