CBS News Correspondent Sam Litzinger takes a look at how shelter animals are being used to boost the spirits of prisoners.

Ecotourism at locations like Yellowstone National Park where people observe creatures in their natural habitat raises money and awareness and is supposed to be a benefit to the animals. CBS News Correspondent Sam Litzinger takes a closer look at how ecotourism might actually be harming wildlife because of their erosion of fear.

Researchers have learned that horses can differentiate a human's mood by their facial expressions. CBS News Correspondent Sam Litzinger has more.

Researchers have discovered reasons why your cat may be so temperamental. CBS News Correspondent Sam Litzinger has more.

Not all humans sound the same -- we all have different accents and dialects. Wolves are the same. Their howls differentiate their species and subspecies. CBS News Correspondent Sam Litzinger has more.

How do animals know to be afraid of their predators? CBS News Correspondent Sam Litzinger has more.

Although they are a technological advancement -- drones have become a major problem -- causing accidents, invading privacy, and they can just be annoying. Now researchers are training birds to intercept the drones -- as a way to protect their owners. CBS News Correspondent Sam Litzinger has more.

Although the California drought is effecting most the population -- the Monarch Butterfly is benefitting from it. CBS News Correspondent Sam Litzinger has more.

Contrary to popular belief -- an octopus is a very social sea creature. CBS News Correspondent Sam Litzinger has more.

The elephant and the naked mole rat -- two completely different sizes -yet- both are resistant to cancer. CBS News Correspondent Sam Litzinger has the story.