Courtesy WGBH

Who’s smarter: a dog or a dolphin? An elephant or an ape? Tonight on Inside Animal Minds: Who’s the Smartest?, scientists get to the bottom of the question. The show is the last of the Inside Animal Minds series on Think Wednesdays and airs at 9 p.m. on GPB.

By the way you can watch it online tomorrow on this page below.

Some scientists believe that relationships make creatures - including humans - clever. That dolphin is a smarty pants because it recruits friends to stir up muddy water in order to catch fish.

Scientists also investigate whether apes have a justice system or dogs feel empathy.

A study recently debunked the belief that dogs are ashamed when they are scolded for bad behavior. But last week’s episode of Inside Animal Minds: Dogs & Senses showed that dogs “feel” through their senses.

Could that be how they experience empathy or sadness even?

What do you think? Share your stories here.