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Look carefully caricature an...

Look carefully caricature and guess the name of musician.

Correct answers: 55

The first user who solved this task is Donya Sayah30.

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Bret Ernst: Blame America

Everybody likes to blame America for everything. What are we, only 233 years old? These other countries are thousands of years old. Not only did they not get it right, but a lot of times they screw up and ask us for help. Thats like a 90-year-old man asking a two-year-old for advice.

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Portland cement

In 1824, in Yorkshire, England, Joseph Aspdin, a stone mason, patented Portland cement, made by burning finely pulverized lime and clay at high temperatures in kilns (UK patent No. 5022). Thus Aspdin had made a manufactured counterpart to natural or Roman cement - a crude formulation of lime and volcanic ash used as early as 27 BC. Aspdin produced a hydraulic cement that would harden with the addition of water. He named his invention "Portland cement" not only to distinguish it from Roman cement, but also as a marketing tool: concrete made from his new cement resembled a highly prized building stone quarried on the Isle of Portland off the British coast. Like flour in a fruit cake, cement glues aggregate (sand or gravel) together to make a "rock" (concrete).

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