Genetics, may explain why Stella and her sister have the same disease., Ecology, is the study of how living things relate to their environment., In our geography class,, we are learning about rivers., A team of scientists has been studying the chemistry, of the ozone layer., It is a fact of astronomy that near the equator,, the earth receives more energy from the sun., The purpose of archaeology is to understand, the past by studying material culture., In biology class, we had to dissect a frog., Yesterday is history. Tomorrow, is a mystery. But today is a gift., I studied electrical engineering,, but after university I didn’t want to work as an engineer., Einstein’s theory marked a new epoch in, physics., Quantum astronomy, is too difficult for a mere mortal to understand..

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