the works of alexander calder. the artist what invented the mobile. >> hello there, thank you for joining us. one of the biggest scandals in sports. the report said that russia has covered up positive test results and recommends lifetime bans for five athletes and coaches. >> we have reported on doping controls on many occasions. not just in the past, but up to and including the middle of this year well after it was known that this investigation is underway. >> we have found cover ups. we found destruction of samples in the laboratories. we found payments of money in order to conceal doping tests. >> paul rhs was at the president conference in geneva. >> they have been looking into allegations made in a german documentary that came out last december. in that documentary we showed russian coaches, members of the russian athletics federation, being involved in doping, giving substances to athletes, allegations that they were extorting money from russian athletes to cover up positive samples, and the chair of this com

alexander calder wanted the mobiles to stir gently, unpredictably. there's nearly 100 works on show by the american-born artist. looking at a progress from wire sculpture to a signature tile. kinetic works that move on their own. >> calder turns sculpture on its head. before he came along it was something mobile. >> he is credited with inventing the mobile. it's no small statement. >> calder really freed sculpture off the pedestal. took it away from the conventions of something static and solid. he brings it out into the gallery, the space. >> he was a larger than life character, and the works delight in their happiness. his grandson remembers an intense artist. >> when he was at work he was serious. the studio was silent. he worked by himself. he didn't play music. he didn't kid around. he was at work. he was very, very focused. >> that focus earnt him a place among the greats of modern art. and the shows are well attended. >> it's no surprise calder is so popular. there's a joyfulness, a playfulness in their works, not found in most modern art. >>

alexander calder wanted his mobiles to sway unpredictably like clouds across the sky. there are more than 100 on display, looking to his wire explup chur to his final style, kinetic works that move on their own. before he came along it was usually marble you moved around. >> he's credited with inventing the mobile, which is no small statement. calder really freed sculpture off the pedestal. took it away from you know the conventions of something static and solid. and he brings it out, into the gallery, out into the space. >> calder was a gregarious larger than life character and the works thriet in their deligr happiness but his grandson remembers a very intense artist. >> when he was working the space was silent, he didn't play music he didn't kid around he was at work. he was very, very focused. >> that focus has earned calder a place among the greats of modern art and his shows are always well attended. >> it's no surprise calder's so popular. there's a joyfulness a playfulness in his works that isn't found in most modern art. the show ends in 1948 with black widow.

alexander calder wanted his moiblemobiles to move slowly. looking at his progression from wire sculpture to works that move on their own. calder turned sculpture on its head. before he arrived, sculpture was made of marble. >> calder took the work away from something static and solid and he brings it out into the cammary, out into the space. >> calder was a gregarious larger than life character and the works delight in their happiness. but his grandson remembers a very intense artist. >> when he was at work, the studio was silent, he never had an assistant once in his career. he didn't kid around, he was very focused. >> the great works of modern art and the shows are widely attended. >> there is a joyfulness playfulness in his work. >> the show ends in 1948 with black widow, but calder continued working until his death in 1976. leaving a legacy of 6,000 works all carefully balanced to glide in the air, are providing great entertainment. jessica baldwin, al jazeera. >>> impressive anomalies in the 4500-year-old burr yalt structures. the ano