A closer look at cat tongues helps explain why the animals' grooming is so effective and may inspire new brushes -- for pets and humans.
Observation could improve filtration systems and boost conservation efforts.
Scientists are developing a "living sensor" that eats hydrocarbons to monitor the country's extensive network of petroleum pipelines.
Some of the so-called “hygrobots” can spontaneously advance across a wet surface.
Robotic bugs may someday help in search and rescue.
Manufactured rhino horns are criticized by conservation groups, but some economists think the conversation should stay open.