See the full video below, which shows unusual features on the sun, including coronal moss, spicules, and coronal rain. ESA said the brightest regions are around 1 million degrees Celsius ...

He says, ‘I hope they ask the question: “what is that?”’. Resembling a boat’s anchor, these are the minuscule projections from the skin of a sea cucumber, known as spicules. These needle-sharp ...

1. Modern desmosponge. Find the pores, and notice the thread-like spicules made of protein. This sponge grew up around a bryozoan colony, which you can see at the bottom and top of the specimen, and a ...

I use biological microremains—phytoliths, diatoms, and sponge spicules—to assess past environmental conditions. Phytoliths, which are produced by plants, can be used to see changes in vegetation; ...