A tetrahedron is the simplest Platonic solid. Mathematicians have now made one that’s stable only on one side, confirming a decades-old conjecture ... .
With the help of powerful computers, researchers discovered a four-sided shape that naturally rests on one side, and built a real-life version from carbon fibre and tungsten ... .
From stressful airport experience, to pre-flight jitters, you've never probably had time to realise why all passengers board airplanes from the same side ... passengers board airplanes from the same side.