If your little ones come to you this holiday season wanting to know just how does Santa get around the world in one night, you no longer have to be stumped for an answer! Just use the clever explanation provided below from science expert Professor Brian Cox.
Speaking on ITV's This Morning, Professor Cox revealed exactly how Father Christmas does it. Warning: it's a little complicated!
"Einstein gave us the answer in 1905 with his special theory of relativity," Professor Cox explained to TV presenters Ruth Langsford and Eamonn Holmes.
"What Einstein told us, which is true, is that if you get closer to the speed of light you go faster and faster and then distances shrink."
Oh dear, we did warn you. Hold on, there's more...
"Let’s say Santa’s going around the globe now, so he starts off in Canada and he goes whizzing across to Europe," Professor Cox continued.
"Now that’s 3,000 miles or something. But if you’re going very close to the speed of light - let’s say 99.99999% of the speed of light - distances shrink in that case by a factor of 7,000.
"7,000 miles is one mile when you’re travelling close to the speed of light."
Well, there you have it! It's certainly not the easiest explanation but with all that science speak, you'll hopefully convince the kids that Santa is super speedy and that it is possible to travel around the world in one night after all.