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Charles Darwin may be dead and gone but a recent write-in campaign has pitted him against Republican
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
Orangutans are limited to the islands of Sumatra and Borneo, where their numbers are rapidly declini
Medicinal leeches on a patient’s neck. Today leeches are sometimes used in microsurgery to prevent b
Learning through Art: Food Webs
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