Those discoveries have opened a wide gap between what the genetics seem to be saying and what the archaeology actually shows.

There are two obvious explanations for this wide gap, apart from simple new-world indifference.

Currently there can be a wide gap between the number of voters in neighbouring constituencies, rendering some easier to win than others.

There still appears to be a wide gap between the public's understanding of the commitments made by banks that will get taxpayers' money and the banks' own understanding.

There's talk of thrilling if not life-changing ideas, but there's a wide gap between these and workable plans.