Krzysztof Bieresniewicz, leader of a team of amber hunters, presents pieces of Baltic amber found by using the hydraulic pressure method in a field in Laszka, northern Poland on March 12, 2026. The method is based on using a pipe and a special rod to pump water at high pressure several metres underground, which causes pieces of amber to be washed up to the surface where it can be easly collected by pickers into collection nets. Formed some 40 million years ago from conifer resins, amber often contains air bubbles, plant fragments or insects trapped before fossilisation, granting each piece a unique "fingerprint". (Photo by Wojtek RADWANSKI / AFP)