Amazon S3 on MSN
How a camera obscura projects the outside world indoors
The science pros at TKOR reveal how a simple dark room and light can create a real-life camera obscura that projects the outside world indoors.
Amazon S3 on MSN
A step-by-step tutorial for building an easy homemade rocket
The science pros at TKOR build a simple homemade rocket to demonstrate thrust. Leader linked to ISIS ambush that killed 3 ...
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