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Author Question: Use the rules of validity to determine whether "All nuclear weapons are dangerous weapons. Some ... (Read 814 times) |
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.