cancer deaths metastasis spread

Most cancer deaths happen after the cancer spreads

Cancer cells can leave the original tumor and grow in other parts of the body. This process is called metastasis. Most cancer deaths are caused by cancer after it has spread rather than by the original tumor alone.

Perfect encryption needs a key as long as the message

Claude Shannon showed that perfect secrecy requires a key containing at least as much information as the message itself. A correctly used one-time pad meets this rule and can provide perfect secrecy.

A small alphabet gave Gutenberg's printing system an advantage

Printing with the Latin alphabet required a fairly small set of reusable letters. Chinese printing needed thousands of different characters. This made movable type much cheaper and easier to manage in Gutenberg's system than in Chinese writing.

Like this? There’s a whole feed of it. Replace empty scrolling with things worth knowing.

Download Hence for free

cancer deaths metastasis spread

Most cancer deaths happen after the cancer spreads

Keep exploring