It has almost become a January tradition (since Fantastic species and where to find them in 2017) that I start the year writing a light-hearted feature on the wonders of the natural world. So this years it's all about sponges:
Magical mysteries of marine sponges
Current Biology Volume 31, Issue 2, 25 January 2021, Pages R51-R54
Many sponges have hidden mineral skeletons, but glass sponges have their glass structures on display, like this Venus’ flower basket (Euplectella aspergillum) found in deep waters of the Pacific. (Photo: NOAA Okeanos Explorer Program, Gulf of Mexico 2012 Expedition (CC BY 2.0).)
PS Last year's "fantastic" feature was about evolutionary lineages losing or gaining legs when they change their way of locomotion:
It is now in the open archives.
Where you'll also find the first feature of last year, about life after the anthropocene.