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**Fossilized Dinosaur Brain Tissue Identified for the First Time**

An unassuming brown pebble, found more than a decade ago by a fossil hunter in Sussex, has been confirmed as the first example of fossilised brain tissue from a dinosaur.

The research is in

*Geological Society of London*. (full open access)

#dinosaurs #neuroscience

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**Fractal based on Steiner chains**

**Steiner chain**what is it?

In geometry, a Steiner chain is a set of n circles, all of which are tangent to two given non-intersecting circles, where n is finite and each circle in the chain is tangent to the previous and next circles in the chain.

Read & learn:

http://mathworld.wolfram.com/SteinerChain.html

Animation via reddit

#math #geometry #steinerchain #fractals #animation

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