There's been a growing movement to develop new technologies to replace at least some of the animals used in scientific research. Researchers across Canada are working to create these tools, to usher in a new animal-free era for medical science.

PLUS:

• Harbor seals can 'talk' thanks to their parrot-like brains
• 'Flaming hot' water ice may explain Neptune and Uranus' strange magnetism
• A thigh bone that could represent the oldest evidence of our human lineage
• The ravens of Yellowstone remember where wolves typically kill their prey