Animal right activists call on SeaWorld to free its orcas
UAE park offers refuge for neglected wild animals
Heroes divided in 'Captain America: Civil War'
Wind energy converter inspired by ancient boats
Water harvester goes on display
Syrian 'doomsday' seed collection recreated in Lebanon
Heavy rains batter central Chile causing severe flooding
Mexico's Popocatepetl volcano erupts in fiery show
Beyonce teases fans with trailer for "Lemonade"
Flint lawsuits could face uphill battles
Solar powered bid to bring modernity to developing world
Asia study warns of severe water shortages