Archaeopteryx Fossil

What is it?

This fossil was termed "the missing link" between birds and dinosaurs.

Where could I find it?

It is considered one of the top treasures of the Natural History Museum in London. (It's their most valuable fossil!)

What is it made of?

The bird-dinosaur's skeleton left an impact in stone, an inorganic material.

How big is it?

No data is available online. You'll have to go see it in person!

What could happen to it?

Under incorrect relative humidity levels, water molecules within the fossil could be rehydrated, causing them to expand. In the same way, absorbed salts could be activated by increased humidity levels and would effervesce out of the stone and recrystallize. This would fundamentally change the chemical and structural makeup of the object, leaving it susceptible to more damage.

Where can I learn more?

https://www.nhm.ac.uk/discover/12-highlights-of-the-treasures-gallery.html