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Homepage Accessibility links Skip to content Accessibility Help BBC Accountrequire(["idcta/statusbar"],function(a){new a.Statusbar({id:"idcta-statusbar",publiclyCacheable:!0})}),document.querySelector(".idcta-wrapper").classList.remove("no-js") Notifications Home News Sport Weather iPlayer Sounds Bitesize CBeebies CBBC Food Home News Sport Business Technology Health Culture Arts Travel Earth Audio Video Live More menu Search iPlayer Home News Sport Weather iPlayer Sounds Bitesize CBeebies CBBC Food Home News Sport Business Technology Health Culture Arts Travel Earth Audio Video Live Close menu !function(){var e=document.getElementById("tviplayer");-1===e.className.indexOf("tvip-js")&&(e.className+=e.className?" tvip-js":"tvip-js")}(); iPlayer NavigationiPlayer Accessibility HelpMenuFIFA World CupChannels;;Channels Sub NavigationScroll Channels Sub Navigation leftBBC OneBBC TwoBBC ThreeBBC FourBBC Radio 1CBBCCBeebiesBBC ScotlandBBC NewsBBC ParliamentBBC AlbaS4CScroll Channels Sub Navigation rightCategoriesCategoriesCategory Sub NavigationScroll Category Sub Navigation leftDrama & SoapsFilmsComedyDocumentariesSportNewsEntertainmentMusicFoodLifestyleHistoryScience & NatureArtsFrom the ArchiveAudio DescribedSignedNorthern IrelandScotlandWalesCBeebiesCBBCScroll Category Sub Navigation rightDrama & SoapsFilmsComedyDocumentariesSportNewsEntertainmentMusicFoodLifestyleHistoryScience & NatureArtsFrom the ArchiveAccessible alternative formatsAudio DescribedSignedRegionsNorthern IrelandScotlandWalesChildren’sCBeebiesCBBCA-ZTV GuideWatchlistHomeTech NowBuilding My BodyJavaScript seems to be disabled. Please enable JavaScript to take full advantage of iPlayer.Tech Now - Building My BodyTech NowBuilding My BodyShiona McCallum meets the medical expert testing out the future of prosthetics following his own near-fatal cycling accident. Paul Carter heads inside Amazon's AI chip lab in Austin, Texas. More