As biological beings, we are wired to pay close attention to every stimulus in our environment. (edutopia.org)
It is a very useful tool when dealing with simple biological beings, but for animals such as dogs, you are inevitably create a problem over several generations. (breedingbusiness.com)
These chemicals are known as «biomarkers,» and the discovery of O2 in one of these distant atmospheres may lead us to believe that something biological is producing the molecule, as plants do on Earth through photosynthesis. (science.howstuffworks.com)