13. Liquids can defy gravity – When cooled down to near absolute zero temperatures, certain substances such as helium become superfluids with zero viscosity, capable of climbing walls or seeping through microscopic cracks. This occurs thanks to a weird quantum effect which makes individual atoms act as one, flouting both gravity and surface tension. Ferrofluid (pictured) is just as mind-blowing; made by suspending tiny magnetic particles of iron in oil, these magnetic liquids form intricate patterns of peaks and troughs when they are placed in a magnetic field.
