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Researchers have discovered and described two new species of Amazonian fish — one with striking red-orange fins and the other so small it is technically considered a miniature fish species. Both species inhabit waters located at the bleeding edge of human encroachment into the Amazon rainforest roughly 25 miles north of the Brazilian city of Apuí. The study’s authors said that ongoing deforestation in the region places these roughly inch-long fish, part of a group known [...]

Deep in the Brazilian Amazon River basin, scientists discovered a small, river-fed lake filled with more than 100 adult electric eels. Researchers witnessed the electric eels working together to herd small fish into tightly packed balls. Groups of up to 10 eels periodically split off to form cooperative hunting parties. Those smaller groups then surrounded the prey and launched simultaneous electric attacks. The findings overturn the idea that these serpentine fish are exclusively solitary [...]

Source: ScienceDaily The remains of domesticated crop plants at an archaeological site in southwest Amazonia supports the idea that this was an important region in the early history of crop cultivation, according to a new study. https://www.sciencedaily.com/releases/2018/07/180726090212.htm

Source: Science Daily Scientists have made a model to map out the phases in which silica (SiO2) transforms into coesite, by analyzing how the inelastic scattering of light among molecules changes according to pressure variation. https://www.sciencedaily.com/releases/2018/01/180116123736.htm