USA

  • Sunrise through an oak-hickory forest canopy at Tyson Research Center, Washington University in St. Louis, Missouri. (Jonathan Myers)
  • The leaves of a sugar maple start to yellow as winter approaches, Tyson Research Center, Washington University in St. Louis, Missouri. (Jonathan Myers)
  • An ornamental cherry tree loses its leaves in the fall at the Tidal Basin, Washington, DC. (Amy Zanne)
  • A frost covered dandelion head spreads as winter arrives at the University of Idaho Arboretum, Moscow, Idaho. (Simon Uribe-Convers)
  • A birch leaf turns a bright yellow as winter approaches, Gateway Arch, St. Louis, Missouri. (Amy Zanne)
  • Maple leaves change colors before they fall in Rock Creek Park, Washington, DC. (Amy Zanne)
  • Early winter brings out the reds and oranges on sugar maple trees at the Gateway Arch, St. Louis, Missouri, USA. (Amy Zanne)
  • Buckeye leaves emerge in the spring after the winter frost at Forest Park, St. Louis, Missouri. (Amy Zanne)
  • Newly emerged tulip poplar leaves in spring after winter frost at Joyce Kilmer Memorial Forest, Robbinsville, North Carolina. (Amy Zanne)

The Study of Plant Evolution

Published December 27, 2013

A new study reveals how plants have evolved to cope with the cold, but as VOA’s Rosanne Skirble reports, these same mechanisms may not provide the same defense against human-induced climate change in a rapidly warming world.


You May Like

Tunnel Bombs Highlight Savagery of Aleppo Fight

Rebels have used tunneling tactic near government buildings, command posts or supply routes to set off explosives; they detonated their largest bomb this week under Syria's intelligence headquarters More

Sierra Leone Launches New Initiative to Stop Ebola Spread

Government hopes Infection and Prevention Control Units, IPC, will help protect patients and healthcare workers More

UN Official: Fight Against Terrorism Must Not Violate Human Rights

UN High Commissioner for Human Rights says efforts by states to combat terrorism are resulting in large scale rights violations against the very citizens they claim to defend More