Why do lions make such a deep, low-pitched roaring sound? Do other big cats make this sound? If not, why? - Quora
Is it true that out of all big cats, only the tiger's roar can paralyze and immobilize its prey? - Quora
National Geographic Kids Everything Big Cats: Pictures to Purr About and Info to Make You Roar!: Carney, Elizabeth: 9781426308055: : Books
15 Little-Known Facts About Big Cats
Fun Facts - Lions — Ages Apparel
Lions: Interesting Facts for Kids about the King of the Jungle - Learning Mole
Everything you need to know about lions
Why can only big cats roar? - Discover Wildlife
factsdaily BLAST From The PAST!!! BIg Cat Fact - A Lion's Roar can be heard for 5 miles and the sound can reach up to 114 decibels! The roar normally
Truth or Tail: A lion's roar can be heard 5 miles away, Cleveland Zoological Society
Discover the 10 Reasons Why Lions Roar - AZ Animals
BBC - Earth News - Why lions roar and wildcats miaow
Lion Fact Sheet - Tenikwa Wildlife Awareness Centre