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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

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Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

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The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Maslow's Hierarchy of Needs Maslow's Hierarchy of Needs
Anatomically modern humans left archaeological clues, including evidence of burials, which indicate Anatomically modern humans left archaeological clues, including evidence of burials, which indicate
Maslow’s hierarchy of needs proposes that lower needs dominate the individual’s motivations and ... Maslow’s hierarchy of needs proposes that lower needs dominate the individual’s motivations and ...
Step 8 is very important. Be sure that the customer’s concern has been corrected. Step 8 is very important. Be sure that the customer’s concern has been corrected.
Hydrolysis reactions for some biochemically important phosphate compounds (part 2) Hydrolysis reactions for some biochemically important phosphate compounds (part 2)
Healthy Eating Behaviors and Weight Gain Are Important Considerations during the Third Trimester Healthy Eating Behaviors and Weight Gain Are Important Considerations during the Third Trimester
Video: Replication of DNA and Chromosomes/ How do cells replicate their DNA? (Animation) no Audio

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