2 ms·

This work was done in mice. These are mouse embryos.

• ljlolel 4y ago
  Not saying they’re the same but humans essentially look like fish, chickens, pigs (gils, tails, etc) for the first few weeks.
• 01acheru 4y ago
  It is up to one's empathy, but mercy isn't something strictly directed towards humans. For some people it is universal, others have no mercy even for fellow humans.