George Tsianos is a physician based in the Scottish Highlands and specializes in human thresholds/responses when exposed to high altitude or cold environments.

He has climbed the Himalayas, the Rockies, the European Alps, the Atlas Mountains, the Scottish Highlands and mountain ranges throughout Greece. He has swum all over the world and has completed crossings and races in oceans, seas, rivers and lakes.

Growing up, he took up competitive swimming. Today, he explores the limits of human potential, testing his body and mind through extreme endurance sports challenges.

In 2011, he fulfilled a lifelong ambition to swim in the Aegean. He swam non-stop from the Peloponnese to the coast of Crete, a distance of 101 kilometers, in 28 hours and 16 minutes. Thus, he became the 1st person in history to successfully swim in the open Aegean.

From the day he first conceived the idea of swimming in the Aegean to the day he completed it, 11 years passed, thousands of kilometers were swum during training, 6 starts did not go ahead due to last-minute unforeseen weather conditions and 1 attempt was abandoned on 1/ 3 of the route due to adverse weather conditions.

Through the Aegean swim, he raised awareness of Orizon, a non-profit charity in Crete whose volunteer work and member fundraising support, among others, children and adults with complex medical conditions.