Uncategorized
- Math
Guessing Cards
Card-guessing tricks give a magician the opportunity to show off his or her mind-reading prowess. In many cases, the illusion of mind reading arises not from sleight of hand but as a consequence of some mathematical principle. One of the most startling of such prediction tricks is known as the Kruskal count, named for Rutgers […]
- Health & Medicine
Ultrasound boosts drug delivery to tumors
A beam of ultrasound can make the blood vessels that infiltrate cancerous growths leakier than normal.
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19046
This article illustrates the importance of astronomical instruments by suggesting that Copernicus was not “proved right” until the development by Tycho Brahe of sophisticated observational tools late in the 16th century.
