In an email a few weeks ago, 13-year-old Marta asked me, Are chimps and dogs more sentient than rats and hamsters? Is my dog Harry more sentient than my hamster Millie? Do mammals suffer more than ...

Add Yahoo as a preferred source to see more of our stories on Google. All three of these discoveries came in the last five years — indications that the more scientists test animals, the more they find ...

Being sentient means having the ability to feel. A large body of scientific evidence stemming from studies of diverse species clearly shows that many nonhuman animals (animals) are sentient beings. 1 ...