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Experts at the St. Louis Zoo are trying to figure out how a 62-year-old ball python (mãng xà, con trăn; hồn ma, người bị hồn ma ám ảnh) laid seven eggs despite not being near a male python for at least two decades.

Mark Wanner, manager of herpetology (khoa học về loài bò sát) at the zoo, said it unusual but not rare for ball pythons to reproduce asexually. The snakes also sometimes store sperm (tinh trùng) for delayed fertilization (thụ phấn, thụ tinh).

The birth also is unusual because ball pythons usually stop laying eggs long before they reach their 60s, Wanner said.

“She’d definitely be the oldest snake we know of in history,” to lay eggs, Wanner said, noting the she is the oldest snake ever documented in a zoo.

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