Warm-blooded vertebrates with hair. Play Mammals trivia solo to sharpen your knowledge, or challenge a friend head-to-head in Trivia Tango — every question comes with an explanation so you learn as you play. Questions span every level, from easy warm-ups to expert-level stumpers, so there's a real challenge here however much you already know.
A mix of easy, medium and hard — questions run from warm-up to expert, so there's a real challenge at every level. Think you know the answers? Play to find out.
This black and white mammal from China eats almost exclusively bamboo.
Difficulty: EasyThis social structure, where only one female in a group breeds, is seen in naked mole rats and some wolf packs.
Difficulty: MediumThis retroviral element makes up approximately 8% of the human genome, representing ancient viral infections in our ancestors.
Difficulty: HardThis is the largest land mammal on Earth.
Difficulty: EasyThis protein in mammalian blood is responsible for carrying oxygen from the lungs to body tissues.
Difficulty: MediumThis phenomenon allows female spotted hyenas to have masculinized genitalia, including a pseudo-penis.
Difficulty: HardThis marine mammal is known for its intelligence and playful behavior, often seen performing at aquariums.
Difficulty: EasyThis whale has the largest brain of any animal, weighing up to 20 pounds.
Difficulty: Medium