The story of coffee's discovery begins, as legend has it, with a goat herder in Ethiopia named Kaldi. One day, he noticed his goats were full of energy, practically dancing, after eating bright red berries from a particular bush. Curious, Kaldi tried the berries himself and felt a similar stimulating effect.

He brought the berries to a local monastery, but the head monk was suspicious and threw them into a fire. As the beans roasted, they released an enticing aroma. The monks raked the beans from the fire, ground them up, and dissolved them in hot water, creating the world's first cup of coffee. They found the drink helped them stay awake during their long evening prayers.

While the story of Kaldi is likely a fable, it points to a historical truth: coffee's origins lie in the highlands of Ethiopia. The Coffea arabica plant is native to the forests of the Kaffa region, where it still grows wild.

From Ethiopia, coffee's journey took it across the Red Sea to Yemen in the 15th century. It was here that coffee cultivation and trade truly began. The port city of Mocha became a major hub for the coffee trade, so much so that its name became synonymous with the drink.

In Yemen, Sufi monks embraced coffee. They drank it to stay alert and focused during their nightly religious ceremonies and devotions. The beverage helped them sustain long periods of prayer and meditation, and its popularity soon spread throughout the Arabian Peninsula.

The coffee that the monks and traders enjoyed, Coffea arabica, has a fascinating genetic history that long predates Kaldi. Scientists have discovered that Arabica coffee originated around 600,000 years ago in the forests of Ethiopia.

It was not a planned creation. Instead, it was the result of a natural hybridization, a spontaneous cross-pollination event between two other coffee species: Coffea canephora (commonly known as Robusta) and the lesser-known Coffea eugenioides. This chance event created a new species with the complex aromatic qualities of eugenioides and some of the hardiness and caffeine content of canephora, resulting in the beloved Arabica bean.

From a legendary discovery to its cultivation in Yemen and its ancient genetic roots, coffee began a journey that would eventually take it across the globe.