Episode 1. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 1/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 1. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 1/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 3. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 3/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 2. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 2/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 3. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 3/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 4. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 4/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 5. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 5/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 5. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 5/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.

Episode 6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale. 6/6. A behind-the-scenes look at the series that explores the most successful animal group on Earth, from the tiny Etruscan shrew to the largest mammal in existence - the blue whale.