There wasn't much, but small discussion (39 points, 5 days ago, 3 comments) https://news.ycombinator.com/item?id=43261947
Papers:
A neural basis for prosocial behavior toward unresponsive individuals https://www.science.org/doi/10.1126/science.adq2679
Reviving-like prosocial behavior in response to unconscious or dead conspecifics in rodents https://www.science.org/doi/10.1126/science.adq2677
An innate drive to save a life https://www.science.org/doi/10.1126/science.adv3731