I agree. I showed my son and husbanad a photo today that was posted on another thread. I am was a geologist, my husband was a mining engineer, and my son took earth science courses. All three of us agreed it looked like a crinoid fossil.
The implications of fossils on Mars need to be thought through and such an announcement is not to be made lightly.
I've spent time in an active gold mine. The first hundred feet or so goes through sedimentaries. Then you get into the slates and metamorphics. Seen alot of interesting stuff there. But I never saw a sphere. Or anything rotini shaped. Rocks can do alot of amazing things, but the crystalline structure is almost always plainly evident.