Joe Velaidum can't help but wonder what could have happened if he'd lingered outside his front door for just a couple of minutes longer before taking his dogs for a walk. 

The timing of their departure that day last July proved lucky. Just seconds later, a meteorite would plummet onto the front walkway of Velaidum's home in Marshfield, Prince Edward Island, shattering on impact with a reverberating smack. 

"The shocking thing for me is that I was standing right there a couple of minutes right bef…