Ancient rock carvings unveiled in Amazonian tributary during severe drought

Severe drought in the Amazon rainforest has revealed petroglyphs carved by humans up to 2,000 years ago in the Negro River. The engravings depict humans, animals, and geometric shapes and were found at a Brazilian Cultural Heritage site. The drought has caused the river's water level to drop, exposing the petroglyphs. The age of the carvings is uncertain, but ceramics found nearby date back 2,000 years. Archaeologists are concerned about the exposure of the petroglyphs and are engaging the public in preservation efforts.