![]() Volta, while initially impressed with Galvani’s findings, came to believe that the electric current came from the two different types of metal (the hooks on which the frogs were hanging and the different metal of the probe) and was merely being transmitted through, not from, the frogs’ tissues. ![]() Image source: Luigi Galvani / Wikimedia Commons. He thought this response was caused by ‘animal electricity’ from within the frog. Luigi Galvani found that the legs of frogs suspended on brass hooks would twitch when prodded with a probe made of another type of metal. He believed that this was caused by electricity from within the frogs’ tissues, and called it ‘animal electricity’. In 1780, Galvani had shown that the legs of frogs hanging on iron or brass hooks would twitch when touched with a probe of some other type of metal. The invention of the battery as we know it is credited to the Italian scientist Alessandro Volta, who put together the first battery to prove a point to another Italian scientist, Luigi Galvani. Archaeologists believe these were not actually batteries but were used primarily for religious ceremonies. Back in 150 BC in Mesopotamia, the Parthian culture used a device known as the Baghdad battery, made of copper and iron electrodes with vinegar or citric acid. All those portable devices we’re so dependent on would be so limited! We’d only be able to take our laptops and phones as far as the reach of their cables, making that new running app you just downloaded onto your phone fairly useless.
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