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Did you know?
Methicillin-resistant Staphylococcus aureus or MRSA was discovered in 1961 in the United Kingdom. It if often referred to as a superbug. MRSA infections cause more deaths in the United States every year than AIDS.
Cambrian trilobite, with a shell made of calcium carbonate.
Angioplasty. One form is called balloon angioplasty, shown here. A balloon catheter is threaded into
chem: acid-base
In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con
Young children typically are boundlessly curious about the world around them.
Corbel Vault, Interior of Tholos, The So-called Treasury of Atreus