How much does the internet weigh?

Chris Smith answers another sample of enquiries from across the scientific spectrum: What might have caused my beetle infestation? Why do so many cultures describe an afterlife? What's the medical explanation for 'cracking the seal?' How do lions identify cubs that aren't theirs? If the Earth stopped rotating, would we feel it? Will hydrogen combustion engines be efficient? Like this podcast? Please help us by supporting the Naked Scientists