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Machine Makes Books Safe – level 1
15-12-2020 07:00
Libraries in Japan use special machines. The machines sterilize...Machine Makes Books Safe – level 2
15-12-2020 07:00
Libraries in Japan use special machines that sterilize books....Machine Makes Books Safe – level 3
15-12-2020 07:00
Libraries in Japan use machines that sterilize books using...First Person Gets a Vaccine – level 1
14-12-2020 07:00
Margaret Keenan is 90 years old. She is the...Telescope Collapses – level 2
09-12-2020 15:00
The Arecibo Telescope was a telescope in Puerto Rico....