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