This weekend, my brother Nick emailed my twin sister and me to congratulate us for reaching exactly one billion seconds! A billion seconds, he told us, equals 31 years, 259 days, 1 hour, 46 minutes and 40 seconds. I love how, true to form, Nick adjusted for daylight savings, leap years and time zones. :)P.S. Can you guess how long one million seconds is? Answer in the comments below...(Photo by