Nom, nom, nom. All you need for the perfect packed lunch is a delicious triangular sarnie.
Asked by: Hattie Tucker, Poole
Several studies have confirmed this phenomenon. It seems that triangles give you more sandwich filling per bite. A triangular sandwich has two 45° corners that allow you to bite much further towards the middle on your first two bites, where there is more filling. This is followed up by a perfect, crustless third bite as you take the space left in the middle. Bite number four is, of course, mostly crust, but you can’t have everything!
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun facts.
Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.
Subscribe to BBC Science Focus Magazine and try 3 issues for just $9.95
Discover our latest special editions covering a range of fascinating topics from the latest scientific discoveries to the big ideas explained.
Listen to some of the brightest names in science and technology talk about the ideas and breakthroughs shaping our world.
By entering your details, you are agreeing to our terms and conditions and privacy policy. You can unsubscribe at any time.