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Hydrogen is the 2nd clue. It is an Ekaterina clue and was hidden in CERN on the French-Swiss Border.

HistoryEdit

It is unknown who placed the clue in CERN or how it was put there. However, CERN is a research facility that is open to any scientist around the world but it is a secret Ekaterina stronghold which holds this clue.

HydrogenEdit

Hydrogen is an element that is number 1 on the periodic table. Hydrogen is one of the few elements that is a gas at room temperature. It is the lightest element and is commonly used in balloons. Hydrogen is also very flammable.