How Do Things Work?
Beginner - Intermediate
15 Videos

Collection of questions and answers explaining how stuff works, for the curious mind.

Showing 3 of 3 videos
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0:58
difficulty - Adv-Intermediate Adv-Intermediate
China

How does a vaccine work?

This video discusses the vaccine for hepatitis B.

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1:02
difficulty - Adv-Intermediate Adv-Intermediate
China

Time Part 1

Time is an intangible thing that is difficult to measure. This little video talks about the different tools used to measure time in history.

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0:59
difficulty - Adv-Intermediate Adv-Intermediate
China

Time Part 2

Time is an intangible thing that is difficult to measure. This little video talks about the different tools used to measure time in history.

Showing 3 of 3 videos
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