According to the website, while Europe was still in the middle of the Dark Ages, the Mayans had mapped the heavens, developed a writing system, and were masters of mathematics.

The statement is true. The Maya developed a complex writing system, used advanced mathematics including the concept of zero, and made detailed observations of the heavens to create accurate calendars. These achievements occurred while Europe was in the period commonly called the Dark Ages, so the correct choice is T.

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