[agentgt]

While I agree that sounds like a plausible theory (and sort of reminds of the domestication theory... ie cute animals get more parental and human focus) but there are just too many animals that barely take care of their young that still sleep.... for example sharks sleep.

[erroneousfunk]

Also, why would we keep on sleeping into adulthood if it was such a massive risk and waste of resources? It doesn't make sense that adults also sleep when they're "getting a break from their kids"