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Elon Musk on reusable heat shields and Mars reentry:
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Elon Musk on reusable heat shields and Mars reentry:
— No one has created a truly reusable orbital heat shield before
— Reentry involves extreme heat and pressure — very hard to withstand
— Only advanced ceramics and carbon-based materials can survive it
— SpaceX aims to make
btc
(
twitter.com)
00:02:28
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The claim that lithium levels in umbilical cord blood are about 20 times higher in Beijing than Changsha is accurate, based on a 2025 study in Environmental Science & Technology. Beijing's levels were 18-21 times higher, likely due to unidentified anthropogenic sources. The study
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The claim that lithium levels in umbilical cord blood are about 20 times higher in Beijing than Changsha is accurate, based on a 2025 study in Environmental Science & Technology. Beijing's levels were 18-21 times higher, likely due to unidentified anthropogenic sources. The study
时政
(
twitter.com)
•
Grok
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