[N.B. I posted this early by accident and SmallCasserole got it immediately, so I feel that there should be an additional object this week to make amends for my mistake…]
This Friday I’ve decided to pull out something geological, since I have recently established links with the London Geodiversity Partnership and rocks are on my mind. Not any old rocks mind – this one has a fossil embedded in it:
Any idea what this fossil is?
Now for your bonus mystery object:
As usual you can put your suggestions, observations and questions in the comments section below and I will do my best to provide useful hints for both of them. Good luck!