Titan is the only world besides Earth known to have rivers, lakes, seas, clouds and rain — except its “water” is methane and ethane, flowing across a surface frozen to minus 179 degrees Celsius. And in June 2026, scientists held the first Humans to Titan Summit, beginning to map what a crewed mission to Saturn’s largest moon would actually require.

Titan is the only world besides Earth known to have rivers, lakes, seas, clouds and rain — except its “water” is methane and ethane, flowing across a surface frozen to minus 179 degrees Celsius. And in June 2026, scientists held the first Humans to Titan Summit, beginning to map what a crewed mission to Saturn’s largest moon would actually require.

Titan, the largest moon of Saturn, is the only world besides Earth known to have rivers, lakes, seas, clouds and rain. The catch is what does the flowing. On Titan the rain is methane, the seas are methane and ethane, and the whole system runs across a surface frozen to about minus 179 degrees Celsius. It is, in shape, the most Earth-like place in the solar system, and in chemistry one of the least. In June 2026 a group of researchers met in Col…