Knots in the solar magnetic field first appear on the sun's surface as dark, Earth-sized sunspots and then, without warning, the kinky field lines break, releasing a coronal mass ejection.
Scientists have been examining what are known as "Amazonian dark earth soils," small, fertile islands that were built up by pre-Columbian Indian tribes and that have especially high concentrations of phosphorous.
Especially common are noun and epithet combinations such as "the dark earth," "the broad sky," "the bronze-corsleted Achaeans," "swift-footed Achilles," or "white-armed Hera". Besides epithets, other formulaic expressions include "answered and addressed him" or "pondered in his heart and mind". There is formulaic action, too: repeated scenes and motifs.
And at my back the spacious mulberry tree, my favourite, which is always last to leaf then stays longest, spreading its big hands above my head now the sky gulps abruptly and the smell of crushed grass and dry brick wakes as the dark earth wakes and I look on.
If that snow melts, the exposure of dark earth (which absorbs heat) acts as a feedback loop that accelerates warming.
"This is pushing my nerves to the limit," Mr. Kron said one recent morning, the sky as dark as the unplanted earth.
The front door had scraped clear a half-moon of dark earth.
In another innovative multidisciplinary project, three PIs whose expertise spans geoscience, archaeology, and materials engineering will collaborate to improve our understanding of extensive deposits of rich soils known as terra preta ("dark earth" in Portuguese) in the Amazon Basin that pre-Columbian societies created and cultivated between 500 and about 8,700 years ago.
In the Brazilian Amazon patches of anthropogenic soils known as Amazonian Dark Earths (ADEs) occur.
Ancient anthrosols known as Amazonian dark earths or terra preta are part of the human built landscape and often represent valuable landscape capital for modern Amazonian populations in the form of fertile agricultural soils.
The dark earth drinks, and the trees drink the earth.
