When we see a dog twitching its legs or barking softly in deep sleep, we often wonder if animals are dreaming of chases. From similar brainwave patterns in rats navigating a maze, strong visual processing activity in pigeons, to the strange skin color changes of octopuses while asleep, the reading passage Do animals dream? (Cambridge IELTS 21 – Test 2, Passage 1) offers a fascinating scientific perspective on the dream world of various species.

Falling under the theme of Neurobiology & Animal Behaviour, this reading passage tests candidates with two common question types: Table Completion and True/False/Not Given. Below is a detailed analysis, a complete translation of the text, and key vocabulary to help you fully tackle this test.

1. Reading Passage Content

Do animals dream?

<b data-