Are the weeds evolving?

We took the boys on a nature walk yesterday and came across this enormous dandelion clock.



Here it is next to Jack's sizable head to get some perspective. Made me wonder, have the weeds evolved since I was little? Usually things seem smaller than when you were little - not the case here.



Warren loved the walk - or should I say ride...zooming down the path on his big wheel. Now that is one thing that hasn't changed a bit in 20 years!