Orca Tahlequah carries her deceased calf in Puget Sound for the second time, highlighting the emotional depth of marine life and their struggle for survival.
Read moreScientists debate fleeing the U.S. due to Trump's policies impacting climate research funding and encouraging self-censorship.
Read moreRenowned physicist Chen Hudong moves to China after decades in the US to spearhead new energy research at Zhejiang University.
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