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The declining age of menarche over the past 150 years has been measured in many European countries,
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
In countries where water can be contaminated, breastfeeding is an important option for the health of ...
An engine will not run if the air–fuel mixture is either too rich or too lean.
The developed countries must reduce the level of greenhouse gas emissions
Illustration of the concept of overlapping genes