How much larger is the human brain compared to other mammals of similar size?

How much larger is the human brain compared to other mammals of similar size?

• A. 4-5 times larger.
• B. 2-3 times larger.
• C. 6-7 times larger.
• D. 1 time larger.

Answer: (A)

The main idea here is brain size relative to body size, a concept often summarized by ENCEPHALIZATION. Humans have a brain that is disproportionately large for our body mass, about four to five times larger than what you’d expect for mammals of similar size. For context, the human brain weighs roughly 1,300–1,400 grams, while mammals of comparable body size typically have brains around 250–350 grams. That gap reflects how neural tissue scales up in humans to support advanced cognition, language, and culture. So, the best answer is that the human brain is about four to five times larger than other mammals of similar size. The other options miss this substantial relative difference or imply no difference at all.

The main idea here is brain size relative to body size, a concept often summarized by ENCEPHALIZATION. Humans have a brain that is disproportionately large for our body mass, about four to five times larger than what you’d expect for mammals of similar size. For context, the human brain weighs roughly 1,300–1,400 grams, while mammals of comparable body size typically have brains around 250–350 grams. That gap reflects how neural tissue scales up in humans to support advanced cognition, language, and culture. So, the best answer is that the human brain is about four to five times larger than other mammals of similar size. The other options miss this substantial relative difference or imply no difference at all.