Like sea stars, ancient echinoderms nibbled with tiny tube feet
Rare 430-million-year-old fossils preserve signs of these tentacle-like limbs
![sea star tube feet](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/09/091217_LH_tube-feet_main_FREE.jpg?fit=860%2C460&ssl=1)
MULTI-PURPOSE FEET Tiny tube feet extend from this sea star’s arm. Uncommonly well-preserved fossils of an ancient relative of this echinoderm show it also had an array of these tentacle-like appendages.
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