Amazon fires stir bitter dispute over who is to blame

As fires raged in the Amazon rainforest, the Brazilian government on Thursday denounced international critics who say President Jair Bolsonaro is not doing enough to curb massive deforestation.

Scientists patent new agent for X-ray

Russian scientists found that nanocrystal tungsten trioxide can be used instead of barium for X-ray examinations and also in cancer treatment. The results of the study are published in Journal of Nanomaterials.

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