letter exposes 22 lab animal deaths at uc berkeley from 2015 to 2017
.twins linus, left, and maarten have more sweat glands and tooth precursors than their older brother joshua, 5, after being treated with a drug in utero.
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."we were quite surprised to find there were no significant differences," says study author
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"we were quite surprised to find there were no significant differences," says study author . .