However, after several years, it turned out that these free radicals are actually very important signaling molecules that actually protect the body [ii]. (siimland.com)
On climate change, the researchers found that political identity was a more important signal of where respondents stood than their academic acumen or scientific sophistication. (scientificamerican.com)
Rather it contains important signals for regulating our genes, determining disease risk, height and many of the other complex aspects of human biology that make each one of us different. (scientificamerican.com)