He also co-founded Lightstorm Entertainment, Digital Domain and Earthship Productions. In addition to his filmmaking, he is a National Geographic sea explorer and has produced a number of documentaries on the subject, including Ghosts of the Abyss (2003) and Aliens of the Deep (2005). Cameron also contributed to underwater filming and remote vehicle technologies and helped create the digital 3D Fusion Camera System. In 2012, Cameron became the first person to perform a solo descent to the bottom of the Mariana Trench, the deepest part of the Earth's ocean, in the Deepsea Challenger submersible. In total, Cameron's films have grossed approximately US$2 billion in North America and US$6 billion worldwide. Cameron's Avatar and Titanic are the second and third highest-grossing films of all time, earning $2.78 billion and $2.19 billion, respectively. Cameron holds the achievement of having directed the first two of the five films in history to gross over $2 billion worldwide. In 2010, Time magazine named Cameron one of the 100 most influential people in the world.