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scientists (to say) that people on the earth that people on the earth (not/to look) always like men and women nowadays. they (to suppose) in the past people not only (can) live longer lives, they (to be) much more taller than human beings (to be) today. somewhere in china, they (to find) two skeletons of 6 and 5 meters tall.
thus, nobody else (to see) those giants since. nevertheless, this theory (to have) a lot of followers. some of them (to think) that 6 meters (not/to be) the limit of human height ,as people who (to live) for more than 500 years (to have) the the ability to continue growing every year, adding 15 centimeters. this (to mean) that there (to be) 15 centimeters.

Scientists say that people on the earth didn't always look like men and women nowadays. They suppose in the past people could not only live longer lives, they were much taller than human beings are today. Somewhere in China, they have found two skeletons of 6 and 5 meters tall.

Thus, nobody else has seen those giants since. Nevertheless, this theory has a lot of followers. Some of them think that 6 meters wasn't the limit of human height, as people who lived for more than 500 years had the ability to continue growing every year, adding 15 centimeters. This means that there (to be) ... 15 centimeters - смысл не понятен (текст не полный?)

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