This photograph taken on August 21, 2026, shows unidentified remains found in the dried-out Danube riverbed near the village of Ryahovo, during an organised fossil hunt after a record low water level revealed mammoth bones there at the end of July. As a drought scorching Europe has caused river levels to drop to record lows, a group of volunteers is scanning the dried-up Danube bank in northern Bulgaria, not far from where the receding waters lay bare mammoth bones last month. The drought in Europe has been exacerbated by human-induced climate change, according to experts, who warn that the problem will worsen. The low river levels have strained shipping and forced nuclear power plants cooled by water from rivers to shut or reduce their output. (Photo by Nikolay DOYCHINOV / AFP via Getty Images)

This aerial photograph shows sand island at the Danube River near the village of Ryahovo, where volunteers comb the dried-out Danube riverbed looking for new finds on August 21, 2026, during an organised fossil hunt after a record low water level revealed mammoth bones there at the end of July. As a drought scorching Europe has caused river levels to drop to record lows, a group of volunteers is scanning the dried-up Danube bank in northern Bulgaria, not far from where the receding waters lay bare mammoth bones last month. The drought in Europe has been exacerbated by human-induced climate change, according to experts, who warn that the problem will worsen. The low river levels have strained shipping and forced nuclear power plants cooled by water from rivers to shut or reduce their output. (Photo by Nikolay DOYCHINOV / AFP via Getty Images)

Volunteers comb the dried-out Danube riverbed looking for new finds near the village of Ryahovo on August 21, 2026, after a record low water level revealed mammoth bones there at the end of July. As a drought scorching Europe has caused river levels to drop to record lows, a group of volunteers is scanning the dried-up Danube bank in northern Bulgaria, not far from where the receding waters lay bare mammoth bones last month. The drought in Europe has been exacerbated by human-induced climate change, according to experts, who warn that the problem will worsen. The low river levels have strained shipping and forced nuclear power plants cooled by water from rivers to shut or reduce their output. (Photo by Nikolay DOYCHINOV / AFP via Getty Images)

(L-R) German Interior Minister Alexander Dobrindt, German Minister for Agriculture Alois Rainer, German Minister for Research, Technology and Aerospace Dorothee Baer, German Minister of State for Europe in the Foreign Office Gunther Krichbaum, German State Minister for Culture and Media Wolfram Weimer, German Chancellor Friedrich Merz and German Finance Minister and Vice Chancellor Lars Klingbeil arrive to pose for a family photo during a retreat meeting of the German cabinet on August 25, 2026 in Neuhardenberg, northeastern Germany. (Photo by John MACDOUGALL / AFP via Getty Images)

(L-R) German Interior Minister Alexander Dobrindt, German Minister for Agriculture Alois Rainer, German State Minister for Culture and Media Wolfram Weimer, German Minister for Research, Technology and Aerospace Dorothee Baer, German Minister of State for Europe in the Foreign Office Gunther Krichbaum, German Chancellor Friedrich Merz and German Minister for Digitalization and State Modernization Karsten Wildberger arrive to pose for a family photo during a retreat meeting of the German cabinet on August 25, 2026 in Neuhardenberg, northeastern Germany. (Photo by John MACDOUGALL / AFP via Getty Images)

German Chancellor Friedrich Merz (4thR), German Minister for Research, Technology and Aerospace Dorothee Baer (5thL) and other members of the cabinet arrive to take their seats to pose for a family photo during a retreat meeting of the German cabinet on August 25, 2026 in Neuhardenberg, northeastern Germany. (Photo by John MACDOUGALL / AFP via Getty Images)

(L-R) German State Minister for Culture and Media Wolfram Weimer, German Minister for Research, Technology and Aerospace Dorothee Baer, German Minister of State for Europe in the Foreign Office Gunther Krichbaum, German Chancellor Friedrich Merz, German Minister for Housing, Urban Development and Building Verena Hubertz and German Minister for Economic Cooperation and Development Reem Alabali-Radovan arrive to pose for a family photo during a retreat meeting of the German cabinet on August 25, 2026 in Neuhardenberg, northeastern Germany. (Photo by John MACDOUGALL / AFP via Getty Images)

(L-R) German Minister for Agriculture Alois Rainer, German Minister for Research, Technology and Aerospace Dorothee Baer, German State Minister for Culture and Media Wolfram Weimer, German Minister of State for Europe in the Foreign Office Gunther Krichbaum, German Chancellor Friedrich Merz and German Finance Minister and Vice Chancellor Lars Klingbeil arrive to pose for a family photo during a retreat meeting of the German cabinet on August 25, 2026 in Neuhardenberg, northeastern Germany. (Photo by John MACDOUGALL / AFP via Getty Images)