Fact Tuesday: Birthday Paradox

This is the first regular feature of this blog: Fact Tuesday! Each Tuesday I will post a quick little science fact.

It’s Fact Tuesday! I’ve started asking fellow employees of the Saskatchewan Science Centre to tell me their favourite science fact. Here is one from Meghan from Visitor Services:

You only need 23 people in a room to have a greater than 50% chance of having two birthdays on the same day. This has certainly been proved true in this office, try it out in yours and then read the science.


It really works too! Last week we had a little birthday party to celebrate the 20th Anniversary of the Saskatchewan Science Centre, plus the birthdays of all of the staff. 21 people wrote down their birthdays on a poster, and Diana and John had the same one!

Stay curious,


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