| Triassic asteroids are among the rarest of fossils, hitherto comprised of only three genera, all from Europe. |
| The Javan rhinoceros is often called the rarest large mammal on earth and perhaps the most endangered. |
| It is only the rarest few who have come to earn this privilege in past lives. |
| It would appear that one of Earth's rarest bird species might have gone extinct. |
| Those who brandish or discharge firearms in a public place would, in all but the rarest cases, be locked up. |
| This part of the National Park is home to some of the rarest creatures in the country such as adders, otters, goshawks and water vole. |
