Blue Peter presenters Helen Skelton and Barney Harwood want to learn more about the solar system so they challenge scientists Helen Czerski and Jem...
Kwinjira kubusa, Shakisha ikintu cyose Nta matangazo yamamaza, Amamiriyoni yicyubahiro kandi yongeyeho buri munsi, Amahuriro yose kandi Yuzuye neza, Ahantu hose kandi igihe icyo aricyo cyose
