Kirstie and Catherine Fields don't have to imagine it. The teenage Welsh twins have what is probably the world's rarest disease -- Fields Condition. It's named after them, because they're the only ...

Get all the news you need in your inbox each morning. The vaquita is the rarest animal in the world and the rarest marine ...

The carnivorous "bone collector" caterpillar is the only known species of its kind, researchers say, and its ancient lineage ...

It does not necessarily reflect the view of The Herald. A councillor has spotted one of the UK's rarest bugs while taking a stroll through a green area in Totton. The strange looking creature ...

A councillor has spotted one of the UK's rarest bugs while taking a stole through a green are in Totton. The strange looking creature is a deep red with bright orange streaks down each of its sides.