One of the major conclusions drawn from this study, with potential far - reaching implications, is that even mild air warming of less than 1 °C is triggering greenhouse gas production at depth: enhanced input of labile organic substances from the soil surface, transported to deeper soil layers via leaching, greatly influences arctic greenhouse gas biogeochemistry. (sciencedaily.com)
And in the sugar maple forests near the Great Lakes, the churning worms actually compact the upper soil layers instead of loosening them, Resner said. (scientificamerican.com)
The researchers estimate that the hominid lived about 2 million years ago based on previous dating of soil layers there. (sciencenews.org)