Why Aren't Mammals as Big as Dinosaurs?

Which creature is considered the largest to have ever lived on Earth?

• African Savannah Elephant

• Blue Whale

• Emphasilious for Gillimus

• Giraffe

What is one reason modern land mammals are not as large as dinosaurs?

• They face high energetic costs in rearing young

• They lay eggs instead of giving live birth

• They have shorter lifespans

• They have a different diet

How did Earth's historical climate contribute to the large size of dinosaurs?

• It was drier, leading to larger water storage in bodies

• It was colder, allowing for larger body sizes

• It was warmer with higher carbon content, promoting vegetation growth

• It was more oxygen-rich, supporting larger lungs

What feature of dinosaur skeletons allowed them to be lighter than expected?

• Larger muscles

• Thicker skin

• Avian-like air sacs

• Denser bones

Why might a mega mammal 'cook' its own tissues?

• Because of their high energy consumption

• Due to their ectothermic nature

• Because they absorb too much sunlight

• Due to their cold-blooded metabolism