THE MUST reads
Tusks and a skull turn up during work on an extension to the Los Angeles rail system.
A parrotlet equipped with custom 3D-printed laser goggles has allowed researchers to study how birds achieve lift.
The loss of groups such as park rangers has a greater negative impact on animals during conflict than chemicals, bombs or mines, researchers find.
The environmental activist group sends two ships to the Southern Ocean, where a fleet of patrol boats protects Japanese whalers.