Scientists have long known that frogs are oddballs when it comes to teeth. Some have tiny teeth on their upper jaws and the roof of their mouths while others sport fanglike structures. Some species are completely toothless. And only one frog, out of the more-than 7,000 species, has true teeth on both upper and lower jaws.

When we think of Australia's threatened corals, the Great Barrier Reef probably springs to mind. But elsewhere, coral species are also struggling—including a rare type known as "cauliflower soft coral" which is, sadly, on the brink of extinction.

With Mother's Day around the corner, it's a good opportunity to ask what being a mother looks like across the animal kingdom. Most of us have a solid concept of human motherhood, but in nature maternal care comes in many forms.

Spanning six years and seven seagrass meadows along the California coast, a paper published today from the University of California, Davis, is the most extensive study yet of how seagrasses can buffer ocean acidification.

The loss of seagrass in the waters around the UK is much higher than previously estimated. A new study published in Frontiers in Plant Science concludes that, with high certainty, at least 44% of the UK's seagrasses have been lost since 1936, of which 39% has been since the 1980s. This study is one of the first of its kind to bring together seagrass data from diverse sources and give a systematic estimate of the current and historic extent of seagrass, as well as seagrass loss in the UK.