'Bonus question: Where is London located? (a) The British Isles (b) Great Britain and Northern Ireland (c) The UK (d) Europe (or 'the EU') (e) Greater London'

2923. "Scary Triangles"

'Concealed mostly beneath the surface, sharks are the icebergs of the sea.'

2924. "Pendulum Types"

'The creepy fingers that grow from a vibrating cornstarch-water mix can be modeled as a chain of inverted vertical pendulums (DOI:10.1039/c4sm00265b) and are believed to be the fingers of Maxwell's Demon trying to push through into our universe.'

2925. "Earth Formation Site"

'It's not far from the sign marking the exact latitude and longitude of the Earth's core.'

2926. "Doppler Effect"

'The Doppler effect is a mysterious wavelength-shifting phenomenon which seems to primarily affect sirens, which is why the 🚨 emoji is red.'

2927. "Alphabetical Cartogram"

'Poor Weeoming.'

2928. "Software Testing Day"

'The company tried to document how often employees were celebrating Software Testing Day, but their recordkeeping system kept mysteriously crashing.'