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To obtain an accurate measure of brain size, scientists remove an endocast from the braincase and record its volume, or use CT scanning to measure the inside of the braincase.

The top graph shows how Earth’s climate has fluctuated over the past 3 million years.

Notice how much the fluctuations increased between 800,000 and 200,000 years ago.

A large brain capable of processing new information was a big advantage during times of dramatic climate change.

To construct this graph, scientists measured the brain cavities of more than 160 early human skulls. They deteriorate, leaving a cavity inside the braincase.

The brains of the earliest humans were similar in size to those of chimpanzees.

But over time, human and chimpanzee brains evolved in several different and important ways.

He started the meet winning the men’s 17-18 long jump at 7.47m/24-6.25 Wednesday afternoon.