Originally it was thought the journey from one side of the Earth to the other - such as London to Antipodes Islands - would take 38 minutes and 11 seconds . It examines the hypothetical scenario of falling through Earth . But student claims this does n't take into account Earth 's changing density . Alexander Klotz from McGill University has published a new estimate . He claims the journey would actually take 42 minutes .
Originally it was thought the journey from one side of the Earth to the other - such as London to Antipodes Islands - would take 42 minutes . It examines the hypothetical scenario of falling through Earth . But student claims this does n't take into account Earth 's changing density . Alexander Klotz from McGill University has published a new estimate . He claims the journey would actually take 38 minutes and 11 seconds .