Here is a list of animals found to be self aware.
There are already available hormones for humans which are proven to improve human brain function and thus; intelligence, memory, problem solving, speed of thought process. etc. The research developed out of human growth hormones which have been available for some time now.
I use the term "human level self aware sapience" for a good reason Yes, less than a dozen species (or at least individuals within those species) pass the mirror test of self awareness. ie that they exist as an entity separate from a reflection of themsleves in a mirror, something a human child does from about 18 months of age.
Is an 18 month old intellect an example of human level sapient self aware ness? Of course not.
The human child will continue brain development and cognitive maturity until, by age of 4, it will surpass any other mature animal species on the planet. Then its brain will continue to grow for another 20 years, on average, as will its cognitive abilities. Would we accord human level, self aware sapience, and all the responsibilities that entails, even to a four year old. Personally I wouldnt and human society never has.
Edited by Mr Walker, 05 January 2013 - 01:08 AM.