As more health systems end gender-affirming care for patients amid a crackdown from the Trump administration, scientists and advocates say the science of sex and gender is being misrepresented – and will have major repercussions for the healthcare for all Americans.
Scientists racing to tackle plastic pollution have created a surprising new contender: a biodegradable packaging film made partly from milk protein. Researchers at Flinders University blended calcium caseinate with starch and natural nanoclay to form a thin, durable material designed to mimic everyday plastic. In soil tests, the film fully broke down in about 13 weeks, pointing to a realistic alternative for single-use food packaging.
，这一点在体育直播中也有详细论述
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