利用微痕分析与残留物检测技术，高星团队确认云南甘棠箐遗址中35件木质材料系古人类精心制作、长期使用的专业工具，主要用于挖掘植物根茎等作为食物。为测定这些木器的年代，古生物地层学、古地磁学、光释光和电子自旋共振等多种方法被交叉使用，最终检验、确认它们制作于距今约30万年前的旧石器时代早期，是迄今东亚地区所见最古老的木器。这项发表于国际知名学术期刊《科学》上的研究，有力反驳了过往认为中国旧石器时代技术发展迟缓的观点。
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This technique is more deeply rooted. Choosing wrong datatypes, or casting without care leaves you open to attacks. Whenever you cast some data structure to another one by “removing” information, such attacks can happen:
Read the full story at The Verge.。关于这个话题，91视频提供了深入分析
Hillary Clinton spent six hours answering questions about the late sex offender Jeffrey Epstein on Thursday after being compelled to testify, and Jimmy Kimmel has thoughts.