There are four tastes that can be recognize by the tongue: sweet, sour, bitter and salty. Our tongue has taste receptors that can detect the tastes, but these taste receptors do not act alone. They are aided by the small receptors. Our smell receptors can recognize thousands of different scent molecules. With your nose closed, [...]

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This is a good news for those who dread sharks; but certainly a bad news for conservationists. A conservative new estimate indicates that between 26 million and 73 million sharks are killed worldwide each year. That’s tree to four times higher than the numbers reported by the United Nations Food and Agriculture Organization. Scientists have [...]

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