Agence France-Presse: Half a million ants were enlisted at a German zoo Tuesday by ecologists from the conservation group WWF to call for the protection of the Amazon rainforest, ahead of a trip by Germany's Chancellor Angela Merkel to Brazil. At what the group described as a demonstration, leafcutter ants -- a species indigenous to the world's biggest forest -- were seen carrying leaves bearing slogans cut out by WWF activists such as "Save the Amazon" and "Help, Merkel". The action organised by the zoo in Cologne...