Câu hỏi khó

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...There was speculation (suy xét, nghiên cứu, suy đoán) that wombats (gấu túi úc) had a square-shaped anal (hậu môn) sphincter (cơ thắt, cơ vòng), that the faeces (phân) get squeezed (bóp, vắt) between the pelvic bones (xương chậu), as well as the “complete nonsense” idea that wombats pat the faeces into shape after they deposit them.

The project originated four years ago when Carver was dissecting a euthanised wombat hit by a car and noticed the cubes (khối lập phương) in the last metre of the wombat’s intestine (ruột non). Carver described it as an “isn’t that odd moment”.

“The thing that is striking, how do you produce cubes inside essentially a soft tube?”

The team of researchers in Australia, including the head veterinarian (bác sĩ thú y) at Taronga zoo, Larry Vogelnest, tested the tensile (có thể căng ra, sức căng) strings of the intestine while physicists in the US based at the Georgia Institute of Technology created mathematical models (mô hình toán học) to simulate (giả lập) the production of cubes.

The team discovered big changes in the thickness of muscles inside the intestine, varying between two stiffer regions and two more flexible regions.

“The rhythmical contractions (co bóp) help form the sharp corners of the cubes,” Carver said.

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