The reason most animals and plants can only reproduce by having sex is a biological mystery. But a new hypothesis suggests it's a tactic we've evolved to avoid transmissible cancer.
Is bringing long-extinct animals back from the dead a good idea? Some scientists think so, and are trying their hardest to make it happen.
Scientists push to overhaul human cloning laws in Australia so they can use DNA from three different people to create a baby when there is a risk of the child inheriting the debilitating and potentially fatal mitochondrial disease.
Australian scientists now have access to revolutionary tools which could give them a cutting edge in the fight against diseases like cancer.