what is a billion?

so i love this blog, a cup of jo. she's fab and has so many interesting posts that just make my day. here's her post from early this morning.

This is what she had to say...

"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. :)"

side note: how creative is her brother? i would have never thought of this but it really puts things in perspective when you're thinking about time!