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d4rk-w0lf: Hole In The Wall Beach, California Coast by Don...

weareallstarstuff: Pinwheel Galaxy

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‘Verily a seed grows in soft ground and does not grow on...

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‘Verily a seed grows in soft ground and does not grow on stone; in the same way that wisdom thrives in the heart of the humble and does not thrive in the heart of the proud and haughty - because Allah has made humbleness the instrument of the intellect.’

~Imam Musa al Kadhim (rahimahullah)

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mediumaevum: In the early Middle Ages, time was first marked...

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mediumaevum:

In the early Middle Ages, time was first marked down the length of a candle in hourly increments. Next came large hour glasses, which were only good for an hour…or two.

Then, Brother Gerbert, who later became Pope Sylvester II, invented a simple mechanism in 966 that rang bells at regular intervals throughout the day to call his brethren to prayer. It was the beginning of mechanical clocks as we know them today.

image: Treaty on the geometry of Pope Sylvester II, Bavaria 12th century. Schoenberg collection.

mediumaevum: The eye according to Hunain ibn Ishaq. This...

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mediumaevum:

The eye according to Hunain ibn Ishaq.

This manuscript, dated circa 1200CE, is kept at the Cairo National Library.

Hunayn ibn Ishaq enriched the field of ophthalmology. His developments in the study of the human eye can be traced through his innovative book, “Ten Treatises on Ophthalmology.” This textbook is the first known systematic treatment of this field and was most likely used in medical schools at the time. Throughout the book, Hunayn explains the eye and its anatomy in minute detail; its diseases, their symptoms, their treatments. He discusses the nature of cysts and tumors, and the swelling they cause. He discusses how to treat various corneal ulcers through surgery, and the therapy involved in repairing cataracts. “Ten Treatises on Ophthalmology” demonstrates the skills Hunayn ibn Ishaq had not just as a translator and a physician, but also as a surgeon.

( “Bulletin of the Indian Institute of History of Medicine 26 (1996): 69–74.)

mediumaevum: image: The Geocentric Solar System -Bartolomeu...

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mediumaevum:

image: The Geocentric Solar System -Bartolomeu Velho

Geocentrism is an astronomical theory, central to the astronomy of Ancient Greece that posits that the Earth lies at the centre of the universe.

Until…

In 1543, the Polish astronomer Nicolaus Copernicus published a paper entitled, On the Revolution of Heavenly Spheres. He set out to mathematically demonstrate the viability of a heliocentric solar system, where the planets orbit the sun, instead of the other way around.


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