THE RECORD
What changed
Volta reported a stack of unlike metals and electrolyte producing continuous current.
EVIDENCE
What remains
His 1800 letter, surviving piles and early electrolysis demonstrate its operation.
WHY IT MATTERS
Why it matters
Repeatable current launched electrochemistry and battery technology.
OPEN QUESTION
Where interpretation begins
It grew from Galvani's animal-electricity debate and many researchers, not one isolated invention.