A Portland, Oregon man has become the first person to travel across Antarctica by himself without receiving any assistance. Colin O’Brady completed the 1,500-kilometer trip on Wednesday. He crossed the continent in 54 days. Friends, family and other people followed his progress through messages and pictures he left on social media. O’Brady spoke with his wife Jenna Besaw by telephone soon after he completed the journey. “It was an emotional call,” she said. “He seemed overwhelmed by love and gratitude, and he really wanted to say ‘Thank you’ to all of us.” The 33-year-old O’Brady documented the trip on the social networking service Instagram. He called his journey “The Impossible First”. He wrote Wednesday that he traveled the last 129 kilometers in one big, final push to the finish line. The distance took over one day to complete.