The year 1816 became known as the “Year Without a Summer” because the previous year’s weeklong eruption of Mount Tambora, in Indonesia, clouded the sky with volcanic ash and sulphate aerosols, lowering the earth’s surface temperature for years to come. After thousands of horses either starved to death or were slaughtered for food, transportation and industry across much of Europe began to fail. Around 1817, Karl von Drais, a German nobleman, experimented with wheel arrangements and came up with his two-wheel Laufmaschine (“running machine”), an early precursor to the bicycle.