I believe, those two materials were bamboo and carbonized thread
After thousands of experiments, Edison realized that filaments made from carbonized bamboo could alst for more than 1200 hours. (while others probably only last for several days)
This invention made Edison really rich after he mass produce it in late 1800s
<span>Renaissance" literally means "rebirth." It refers especially to the rebirth of learning that began in Italy in the fourteenth century, spread to the north, including England, by the sixteenth century, and ended in the north in the mid-seventeenth century (earlier in Italy). During this period, there was an enormous renewal of interest in and study of classical antiquity.</span>
When you've carefully checked all the facts and your attitudes and still find that there's "just something" about your supervisor that's causing a problem in your relationship, you should suspect that there's a hidden attitude.
Due to globalization, some of the culture rituals in which boys are required to engage in violent rituals and sometimes in bloodletting of various kinds, have declined in frequency, or have even disappeared. The term globalization denotes a process of interaction and integration among cultures, people and removal of barriers between national economies.
Because he was a military leaser and also a political leader and people used to think that people couldnt do both things.
