Bad smell, good egg

时间:2019-03-06 09:12:12166网络整理admin

By Andy Coghlan HENS lay larger eggs if they smell a substance found in human urine, say researchers in Britain and Israel. Oddly enough, the same substance also appears to improve chickens’ memory. Called 2-methoxy-3-isobutylpyrazine, the substance is one of five pyrazines found in human urine. Abundant in nature, the pyrazine also turns up in the scent glands of beavers,