'Squeaky Curtain' divides Europe’s Eastern and Western mice

Two house mouse subspecies meet again in a hybrid zone strangely reminiscent of the Iron Curtain

Image source: Macholán, M., Baird, S.J., Munclinger, P. et al. Genetic conflict outweighs heterogametic incompatibility in the mouse hybrid zone?. BMC Evol Biol 8, 271 (2008) doi:10.1186/1471-2148-8-271
Strange Maps
  • The house mouse diverged into two subspecies depending on which humans they followed.
  • The Western and Eastern European house mice can interbreed, but the results are, well, mixed.
  • The continent remains divided between Eastern and Western mice except for a narrow contact zone where hybrids eek out a living.
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Gravity is not uniform. It varies geographically.

As this map of Bouguer's gravity anomaly shows, the pull of the earth varies considerably by region.

Image: USGS
Strange Maps
  • The law of gravity may be universal, gravity itself varies considerably across the earth.
  • Most factors can be mathematically accounted for; local geology is the odd one out.
  • Bouguer gravity anomaly maps like these show regional gravitational variation.
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Two-thirds of U.S. students attend diverse schools

School diversity is less widespread in central and northern states

Image courtesy of Cédric Scherer
Strange Maps
  • In 2020, there will be more children of color than white children in the U.S.
  • These maps indicate how racial diversity is changing the demographics of America's schools
  • Diversity has massively increased, but more so in the south and on the coasts than elsewhere
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These 9 U.S. biodiversity hotspots urgently need protection

Project to map global 'species richness' highlights the variety of biodiversity itself

Image courtesy of Clinton Jenkins
Strange Maps
  • Biodiversity is essential for ecosystems – and humanity – to survive
  • These maps show the diversity of biodiversity itself: the hotspots are all over the place
  • Compounding U.S. biodiversity data produces a list of 9 'Recommended Priority Areas', most in need of protection
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