'Urban geology': How to find fossils (and other discoveries) in your city's buildings

If you look closer at the building stones, tiles and pavements of the big city, you can find a hidden world of geology and ...
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Straddle Position: Deductions | Masterclass #15

In this masterclass, we'll take a look at requirements and deductions in straddle jumps. D-Score Fails Falls Sticks Spotters ...