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Vim li cas cov tsev pleev xim liab?

Thomas Durant Visser, University of Vermont Curious Kids yog ib zaj yeeb yaj kiab rau cov menyuam yaus txhua hnub. Yog tias koj muaj lus nug koj xav kom tus kws tshaj lij teb, xa mus rau curiouskidsus@theconversation.com. Vim li cas cov barns pleev xim liab? – Elijah B., hnub nyoog 13 xyoos, Waverly, Tennessee Muaj peb yam uas peb pom muaj ntau lub tsev txhab nyiaj Asmeskas liab. Nws yog […]