Multiple choice general knowledge science & technology

Which animal has the largest brain?

  1. A T-Rex dinosaur

  2. A blue whale

  3. A human

  4. A Elephant
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The blue whale has the largest brain of any animal, weighing about 6 kg (15 pounds). However, brain size doesn't directly correlate with intelligence - dolphins and humans have higher brain-to-body mass ratios (encephalization quotient). T-Rex (A) is extinct, elephants have large brains (about 5 kg), and human brains average 1.4 kg.

AI explanation

Among the animals listed, the blue whale has the largest brain — roughly 6-9 kg, dwarfing the human brain (about 1.3-1.5 kg) and even the elephant brain (about 4-5 kg). (Note: technically the sperm whale has the single largest brain in nature, around 7-8 kg, but it isn't one of the given options, so among T-Rex, blue whale, human, and elephant, blue whale is correctly the largest.) A T-Rex, despite its huge body, had a comparatively small brain (walnut-to-fist sized), and while elephants have very large brains for land animals, they're still smaller than a blue whale's.

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