Why Do Laurel and Holly Trees Have Shiny, Waxy Leaves?
Why Do Laurel and Holly Trees Have Shiny, Waxy Leaves? Laurel and holly trees have developed special kinds of leaves to seal the water insid
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Can People Make Rain Fall?
Can People Make Rain Fall? Yes, under special conditions, scientists can cause rain to fall. They can make rain only if clouds are present.
What Is Genetic Engineering?
What Is Genetic Engineering? In 1972, US biochemist Stanley Cohen and Herbert Boyer began work on altering organisms by cutting up the DNA,