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Update: 25.01.23

Copyright Dr. Eng. Jan Pająk

Img.538 from Seismograph (#E4)

Img.538 (#E4) Zhang Heng - a brilliant mathematician and astronomer from China.
The above likeness comes from an article by Shi Ke, entitled "The Universe Unlimited in Both Space and Time", which in 2003 was made available on the website www.pureinsight.org (he suggests taking a look at this immensely interesting article, if it is still available on the Internet).

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