1 . Elvis Presley was one of the greatest musicians in rock and roll history who changed the way people enjoyed music. Born on January 8, 1935, Presley was raised by loving working-class parents. He received his first guitar as a gift on his 11th birthday and had his first taste of musical success a few years later when he won a talent show at his high school. After graduating in 1953, hе did a number of jobs while pursuing his musical dream.

In 1955, Presley began to develop a following for his unusual musical style and good looks. That same year, he signed with RCA. After that, Presley was on a roll, scoring with his first No.1 single as well as his first No.1 album, and signing a movie contract—all in 1956. From very humble (卑微的) beginnings, he grew into one of the biggest names in rock and roll.

2 . However, because Leonardo was born to parents who were not married to each other, he was barred from some studies and professions. He trained as an artist after moving to Florence with his father in the 1460s. It was an exciting time to be in Florence, one of the cultural capitals of Europe. Leonardo trained with one of the city’s very successful artists, Andrea del Verrocchio. He was a painter, sculptor and gold worker. Verrocchio told his students that they needed to understand the body’s bones and muscles when drawing people.

3 . I still have a thousand questions as to why I struggled to act. Why did it take me many circles around the mall and an argument with myself? I once wavered between helping her and ignoring her. All I know for sure is that while walking toward that woman at the bus stop, a miracle happened.

4 . The “junk DNA” may be useful in developing future cancer treatments, according to a new report in the journal Nature Immunology. The discovery was led by Wilmot Cancer Institute investigators and University of Rochester biologists Vera Gorbunova, Ph.D., and Andrei Seluanov, Ph.D..

The DNA elements under research are known as retrotransposons (逆转录转座子). The bad side of them is that if left to run amok, they can give rise to tumors (肿瘤). Researchers, however, discovered that if they are kept in the correct balance and controlled properly, retrotransposons can cause the immune system to destroy cancer..

5 . Five years ago, French navy officer Jérôme Chardon was listening to a radio program about the journey of the bar-tailed godwit, a bird that migrates 14,000 kilometers between New Zealand and Alaska. Chardon understood how treacherous the journey would be, as heavy storms frequently hit Pacific island communities. Yet, somehow, bar-tailed godwits routinely pass through the area uninjured. Chardon wondered whether learning how birds traveled could help coastal communities avoid natural disasters.

6 . Muscle tissue also tends to keep vaccine reactions localized at the injection site. If certain vaccines are injected into fat tissue, the chance of irritation and side effect increases because fat tissue has poor blood supply, leading to poor absorption of some vaccine components. Vaccines must be given in a muscle to avoid widespread side effect.

Yet another deciding factor in vaccine administration location is the size of the muscle as well as convenience.

7 . This evidence, which is assumed to occur through a bio-behavioral mechanism, suggests that prevention strategies that target modification of psychological well-being-e. g. optimism-may be a potential avenue for AHA to reach its goal of improving Americans’ cardiovascular health by 20 percent before 2020.

8 . One of the biggest challenges is keeping a paper bottle from leaking. The inside of the bottle needs a special coating to make sure the liquid doesn’t leak through. Many companies are lining their bottles with a thin sheet of plastic. Though bottle makers may say this liner can be removed and recycled, many recycling programs don’t have the right machines to handle these liners. But even without the plastic, paper bottles aren’t flawless. Most paper bottles use wood pulp, meaning trees need to be cut down to make the bottles. Frugalpac, a company from the UK, has created wine bottles made of recycled paper, so no trees need to be cut down. Frugalpac still uses a plastic liner, though.

9 . These tiny ants are amazing. In the Sahara desert, where most creatures avoid going out in the middle of the day to avoid high temperatures,the Saharan silver ants have evolved(进化)a number of adaptations to do just that. Scientists have discovered that several unique features of the Saharan silver ants permit them to grow well in a scorching climate.

10 . Grandma smiled and told me the following story, “My hands put food in my mouth and clothes on my back. They tied my shoes and pulled on my boots. They held my husband and wiped my tears when he went off to war. They were uneasy when I tried to hold my newborn son. Decorated with my wedding band, they showed the world that I was married and loved someone special. They wrote my letters to him and shook when I buried my parents. They held my children and grandchildren and comforted my neighbors. They covered my face, combed my hair and washed the rest of my body. These hands are the mark of where I’ve been and the ruggedness of life.”