I thought this was a belated April Fool story but it seems to be genuine. A scientific study on why shoelaces come undone, even though they have been carefully done up, shows that this is a natural result of the impact of shoes on the ground when walking and the forces operating on the laces as they move about.
Now I have long held this to be the case and not, as Mrs C is wont to insist, on my inability to tie them correctly in the first place. Henceforth I shall be proud to consider myself as adding to science when, no more than a few paces into a stroll down the road, one of my shoes works loose. Any researchers looking for a volunteer to assist in further studies (assuming that expenses are paid and luncheon vouchers provided, naturally) are welcome to get in contact.