As far back as the 19th century it was apparent to some biologists that a simple, repeated pattern underlay the differing body structures of animals. It could be seen in the segmented bodies of worms, ...

Purchasing power refers to the quantity of goods or services $20 can buy today. Inflation erodes purchasing power, making $10 buy fewer loaves of bread over 10 years. Investing in S&P 500 funds can ...