French researchers have announced a prototype of an 18650 sodium-ion battery. If you’ve bought ... Better still, sea water is full of sodium chloride (which we call salt) that you can use ...

Designed by the Greek inventor Heron, this coin-operated holy water dispenser was used in Egyptian temples to dispense water for ritual washings. Worshippers would place a coin into the machine and ...

London is famously a hard water area. It’s a badge of dishonour and leaves our kettles, sink sides and showers encrusted with ...

In this procedure, patients are connected to a dialysis machine which acts as an artificial kidney to remove most of the urea and restore/maintain the water and ion balance of the blood.