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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).

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Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

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A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.

Broad-bodied Chaser Broad-bodied Chaser
Bitter Dock Bitter Dock
Biston betularia betularia morpha typica, the white-bodied peppered moth. Biston betularia betularia morpha typica, the white-bodied peppered moth.
Apidium may be ancestral to all later higher primates and is reconstructed as looking like a small-b Apidium may be ancestral to all later higher primates and is reconstructed as looking like a small-b
Beers Law Beers Law
The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ... The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ...
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