Health

Nigeria isn't ready to legalize marijuana: A scientist's view

Nigeria has been debating whether to legalize marijuana. Its House of Representatives is set to discuss a bill to that effect. The Conversation Africa's Wale Fatade asked Olakunle Idowu, a Professor of pharmaceutical chemistry, ...

Diseases, Conditions, Syndromes

How the modern world was shaped by epidemics 500 years ago

The coronavirus pandemic has been compared with many previous contagions, including the great plague and the 1918 Spanish flu pandemic. However, there has been little consideration of probably the most significant historical ...

Medical research

Soil in wounds can help stem deadly bleeding

New UBC research shows for the first time that soil silicates—the most abundant material on the Earth's crust—play a key role in blood clotting.

Medical research

Healthy, stress-busting fat found hidden in dirt

Thirty years after scientists coined the term "hygiene hypothesis" to suggest that increased exposure to microorganisms could benefit health, CU Boulder researchers have identified an anti-inflammatory fat in a soil-dwelling ...

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Soil

Soil is a natural body consisting of layers (soil horizons) of mineral constituents of variable thicknesses, which differ from the parent materials in their morphological, physical, chemical, and mineralogical characteristics. It is composed of particles of broken rock that have been altered by chemical and environmental processes that include weathering and erosion. Soil differs from its parent rock due to interactions between the lithosphere, hydrosphere, atmosphere, and the biosphere. It is a mixture of mineral and organic constituents that are in solid, gaseous and aqueous states. Soil particles pack loosely, forming a soil structure filled with pore spaces. These pores contain sol solution (liquid) and air (gas). Accordingly, soils are often treated as a three state system. Most soils have a density between 1 and 2 g/cm³. Soil is also known as earth: it is the substance from which our planet takes its name. Little of the soil composition of planet Earth is older than Tertiary and most no older than Pleistocene. In engineering, soil is referred to as regolith, or loose rock material.

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