"Spider 'Resurrections' Take Scientists by Surprise"

NatGeo:

Scientists at the University of Rennes in France collected three species of wolf spider—two from salt marshes, one from a forest. The team immersed 120 females of each species in seawater, jostling the spiders with brushes every two hours to see if they responded.

As expected, all the forest wolf spiders (Pardosa lugubris) apparently died after 24 hours. The two salt marsh-dwelling species took longer—28 hours for Pardosa purbeckensis and 36 hours for Arctosa fulvolineata.

After the "drownings," the researchers, hoping to weigh the spiders later, left them out to dry. That's when things began to get weird.