250 Bc

• Greek astronomer Eratosthenes calculates the circumference of Earth.
• Soghdiana is conquered by the Parthians.
• Bactria gains its independence from the Seleucid Empire. (approximate date)
• Antiochus II Theos makes peace with Ptolemy II of Egypt.
• Xiao Wen Wang becomes King of the Qin Dynasty of China but dies before the end of the year.
• First Punic War: Lucius Caecilius Metellus captures 140 war elephants in Sicily, transports them to Rome and displays them in the Circus Maximus.

• Marcus Atilius Regulus, Roman general and consul
• Timaeus, Greek historian
• Erasistratus, Greek anatomist (approximate date)
• Zhao Xiang Wang, King of the Qin Dynasty of China.
• Xiao Wen Wang, King of the Qin Dynasty of China.

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