1. 22 million.
    — 

    The number of Americans who will dress up their pets for Halloween.

    The economics of Halloween: By the numbers

     

  2. Your cat is a killer. According to biologists, when they’re not curling up in your lap, cats are off killing other animals — billions of ‘em. Scientists from the Smithsonian Conservation Biology Institute and the Fish and Wildlife Service estimate that each year, apparently bloodthirsty felines are preying on billions of birds and small mammals like indigenous chipmunks, shrews, and meadow voles. “When we ran the model, we didn’t know what to expect,” researcher Dr. Peter Marra told theNew York Times. “We were absolutely stunned by the results.”

    4 to 18 — Birds killed by a typical house cat every year
    8 to 21 — Small mammals killed by a typical house cat every year
    1.4 billion to 3.7 billion — Total birds killed by America’s cats every year

    More numbers

     

  3. 3.63 billion people lived in cities in 2011. By 2030, 5 billion people are projected to be living in cities.

    Infographic: Our growing cities 

    (Source: theweek.com)

     

  4. America has a pet obsession

    (Source: theweek.com)