Science
- Hectopascal (hPa), a unit of pressure equivalent to about 1/1000 of 1 atmosphere
- Hypothalamic-pituitary-adrenal axis in physiology, regulation of hormone levels and maintaining homeostasis
- Human physical appearance, in anthropology
- Human platelet antigens, in clinical medicine, blood transfusion, alloantigens
- Heteropoly acid, often used as an acidic catalyst
Read more about this topic: HPA
Famous quotes containing the word science:
“There is more religion in men’s science than there is science in their religion.”
—Henry David Thoreau (1817–1862)
“Already nature is serving all those uses which science slowly derives on a much higher and grander scale to him that will be served by her. When the sunshine falls on the path of the poet, he enjoys all those pure benefits and pleasures which the arts slowly and partially realize from age to age. The winds which fan his cheek waft him the sum of that profit and happiness which their lagging inventions supply.”
—Henry David Thoreau (1817–1862)
“We have lost the art of living; and in the most important science of all, the science of daily life, the science of behaviour, we are complete ignoramuses. We have psychology instead.”
—D.H. (David Herbert)