SAN RAMON, CALIFORNIA - JULY 30: Interior view of a high voltage dome at the Pacific Gas and Electric Co. (PG&E) technology center facility on July 30, 2026 in San Ramon, California. PG&E hosted a media open house showcasing home electronic technologies. (Photo by Benjamin Fanjoy/Getty Images)

SAN RAMON, CALIFORNIA - JULY 30: A Pacific Gas and Electric Co. (PG&E) high voltage dome is visible at their technology center facility on July 30, 2026 in San Ramon, California. PG&E hosted a media open house showcasing home electronic technologies. (Photo by Benjamin Fanjoy/Getty Images)

This handout photograph taken by Teodor Mechev and released on July 30, 2026, shows scientists from Rousse's Regional Historical Museum examining remains of an ancient mammoth, as historically low water levels on the Danube River exposed parts of the riverbed near the village of Ryahovo, north east of Rousse. The Danube -- which runs from the Black Forest mountains of western Germany through 10 countries to the Black Sea -- has dropped to record low levels in parts due to prolonged rain shortages and successive heatwaves since May. Woolly mammoths co-existed with early humans who hunted the cold-resistant herbivores for food and used their tusks and bones as tools. Specialists have so far identified a jaw bone, fragments of tusks, part of a shoulder blade and a femur with its articular head among the stash. (Photo by Handout / Rousse Regional Historical Museum / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / ROUSSE REGIONAL HISTORICAL MUSEUM / TEODOR MECHEV - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

This handout photograph taken by Teodor Mechev and released on July 30, 2026, shows remains of an ancient mammoth, as historically low water levels on the Danube River exposed parts of the riverbed near the village of Ryahovo, north east of Rousse. The Danube -- which runs from the Black Forest mountains of western Germany through 10 countries to the Black Sea -- has dropped to record low levels in parts due to prolonged rain shortages and successive heatwaves since May. Woolly mammoths co-existed with early humans who hunted the cold-resistant herbivores for food and used their tusks and bones as tools. Specialists have so far identified a jaw bone, fragments of tusks, part of a shoulder blade and a femur with its articular head among the stash. (Photo by Handout / Rousse Regional Historical Museum / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / ROUSSE REGIONAL HISTORICAL MUSEUM / TEODOR MECHEV - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

This handout photograph taken by Teodor Mechev and released on July 30, 2026, shows remains of an ancient mammoth, as historically low water levels on the Danube River exposed parts of the riverbed near the village of Ryahovo, north east of Rousse. The Danube -- which runs from the Black Forest mountains of western Germany through 10 countries to the Black Sea -- has dropped to record low levels in parts due to prolonged rain shortages and successive heatwaves since May. Woolly mammoths co-existed with early humans who hunted the cold-resistant herbivores for food and used their tusks and bones as tools. Specialists have so far identified a jaw bone, fragments of tusks, part of a shoulder blade and a femur with its articular head among the stash. (Photo by Handout / Rousse Regional Historical Museum / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / ROUSSE REGIONAL HISTORICAL MUSEUM / TEODOR MECHEV - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

This handout photograph taken by Teodor Mechev and released on July 30, 2026, shows a scientist from Rousse's Regional Historical Museum examining remains of an ancient mammoth, as historically low water levels on the Danube River exposed parts of the riverbed near the village of Ryahovo, north east of Rousse. The Danube -- which runs from the Black Forest mountains of western Germany through 10 countries to the Black Sea -- has dropped to record low levels in parts due to prolonged rain shortages and successive heatwaves since May. Woolly mammoths co-existed with early humans who hunted the cold-resistant herbivores for food and used their tusks and bones as tools. Specialists have so far identified a jaw bone, fragments of tusks, part of a shoulder blade and a femur with its articular head among the stash. (Photo by Handout / Rousse Regional Historical Museum / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / ROUSSE REGIONAL HISTORICAL MUSEUM / TEODOR MECHEV - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

This handout photograph taken by Teodor Mechev and released on July 30, 2026, shows scientists from Rousse's Regional Historical Museum examining remains of an ancient mammoth, as historically low water levels on the Danube River exposed parts of the riverbed near the village of Ryahovo, north east of Rousse. The Danube -- which runs from the Black Forest mountains of western Germany through 10 countries to the Black Sea -- has dropped to record low levels in parts due to prolonged rain shortages and successive heatwaves since May. Woolly mammoths co-existed with early humans who hunted the cold-resistant herbivores for food and used their tusks and bones as tools. Specialists have so far identified a jaw bone, fragments of tusks, part of a shoulder blade and a femur with its articular head among the stash. (Photo by Handout / Rousse Regional Historical Museum / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / ROUSSE REGIONAL HISTORICAL MUSEUM / TEODOR MECHEV - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS

This handout photograph taken by Teodor Mechev and released on July 30, 2026, shows scientists from Rousse's Regional Historical Museum examining remains of an ancient mammoth, as historically low water levels on the Danube River exposed parts of the riverbed near the village of Ryahovo, north east of Rousse. The Danube -- which runs from the Black Forest mountains of western Germany through 10 countries to the Black Sea -- has dropped to record low levels in parts due to prolonged rain shortages and successive heatwaves since May. Woolly mammoths co-existed with early humans who hunted the cold-resistant herbivores for food and used their tusks and bones as tools. Specialists have so far identified a jaw bone, fragments of tusks, part of a shoulder blade and a femur with its articular head among the stash. (Photo by Handout / Rousse Regional Historical Museum / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / ROUSSE REGIONAL HISTORICAL MUSEUM / TEODOR MECHEV - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS