How to Find Out Why T. rex Arms Were… Like That | SciShow News

The video explores the evolution of theropod arms, particularly focusing on T. Rex. It discusses various hypotheses, including the idea that small arms helped avoid injury during feeding. A new hypothesis suggests that small arms were advantageous for staying out of the way of powerful jaws. The video also highlights recent discoveries of giant ichthyosaur fossils, providing insights into their size, feeding adaptations, and persistence into the Late Triassic period.

What is one hypothesis for why theropods like T. Rex evolved small arms?

• To avoid injury during feeding

• To improve their swimming abilities

• To make them more attractive to mates

• To help them fly

What does the new hypothesis suggest about the evolution of small arms in theropods?

• They were used for flying

• They were a result of genetic mutation

• They helped avoid injury during group feeding

• They were used for digging

How do researchers plan to gather evidence for the new hypothesis on theropod arms?

• By creating computer simulations

• By observing living dinosaurs

• By analyzing existing fossil damage patterns

• By conducting time travel experiments

Where were the new giant ichthyosaur fossils discovered?

• The Great Barrier Reef

• The Sahara Desert

• The Swiss Alps

• The Amazon Rainforest

What is significant about the newly discovered ichthyosaur tooth?

• It is the smallest tooth ever found

• It suggests ichthyosaurs were herbivores

• It is the largest ichthyosaur tooth ever found

• It was found in Antarctica

What does the diversity in ichthyosaur teeth suggest?

• They had a uniform diet

• They had diverse feeding adaptations

• They were all toothless

• They only ate plants

What does the age of the newly found ichthyosaur fossils confirm?

• They were the first marine reptiles

• They were the last dinosaurs

• They persisted into the latest Triassic

• They lived during the Jurassic period