A growing international divide over cutting-edge medical research could worsen predatory practices, medical tourism and health inequality.
The idea of human-animal hybrids can raise a lot of questions and it's easy to feel they are "unnatural" because they violate the boundaries between species.
The concept of creating human-animal hybrids can be eerie, but that's only because of the way our minds tend to categorise things.
What rights should a chimera with human-like cognitive abilities but without the ability to speak have?
Human-animal hybrids - or 'chimeras' - might sound strange, but they offer great hope for new life saving therapies, as long as key ethical boundaries are respected.