Fred Beihl of Stewartstown is an auctioneer, licensed appraiser and coin dealer. And his son Eddie, pictured here, has picked up his father's interests. Here 14-year-old son Eddie works on an old York ...

Brunnian links are a type of nontrivial link – or knot – where multiple linked loops become unlinked if a single loop is cut or removed. Beyond ‘fun’ disentanglement toys and a tantalizing subject of ...

Three hackers have developed and released a 3D printable master key used by Transportation Security Administration, which opens Safe Skies luggage locks. During a talk given on Saturday, the three ...