from BBC News - World https://ift.tt/2QyNLMJ
Wednesday, November 20, 2019
Why do billions of people still not have glasses?
It's thought 2.5 billion people could benefit from technology first developed in the 1200s.
from BBC News - World https://ift.tt/2QyNLMJ
from BBC News - World https://ift.tt/2QyNLMJ
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