new video loaded: Why This Glacier Worries Scientists the MostOur climate reporter Raymond Zhong describes how the fast-melting Thwaites Glacier of Antarctica, is like a cork in a bottle: If it starts to really disintegrate, many more glaciers around it could do the same,...

Rebecca Morelle,Science EditorandAlison Francis,Senior Science JournalistKevin Church/BBC NewsThe team are now trying to work out if this could be an example of very early Christianity."It's a period where the history is not yet written," says Dr Seaman."We don't really understand early church sites... ...