Sunday Links

• Pricklier By The Day, Perth's Puggle on Zooborns
  
• Mouse and teddy bear Cutest shot in the known universe.
  
• Underwater Dogs
  
• 17 and Sudoku Clues What's the minimum number of clues needed to solve a Sudoku puzzle (and how do we know?)
  
• Realistic Duct Tape Rose the geek approach to Valentine's day
  
• Top 10 popular mathematics books
  
• The Civil War In stereographic 3D
  
• The Scale of the Universe 2 These things are small and close up, those things are big and far away ...
  
• Modern lovers The changing face of love and relationships in the 21st century, featuring my lovely friends Rachel, Luisa and DK!