But while you’re sure to have at least one gadget in your life that needs a SIM card, not all SIM cards are the same, as they come in three different sizes and four different common types. Below then ...

The size of Earth’s orbit around the Sun is shown for scale. Credit: ALMA (ESO/NAOJ/NRAO)/W. Vlemmings et al. The outer layers of most stars are like a pot of boiling water, with giant bubbles ...