This NASA website provides a summary of a study led by NASA's David McKay that may provide evidence for past life on Mars. McKay and his team found carbonate globule features on the ALH84001 meteorite that appear to be nanofossils. In addition, secondary mineral phases and hydrocarbons provide further evidence for past life. The website features color photographs as well as links to related web pages.

How do you track a disease? How do you determine if a blood sample contains a virus or a bacteria that could make millions of people sick? What type of information would you need to know to stop a disease from spreading? If you are interested in these questions then being an “Illness investigator” or a Clinical Laboratory Scientist (CLS) might be the right career path for you. 

How do you track a disease? How do you determine if a blood sample contains a virus or a bacteria that could make millions of people sick? What type of information would you need to know to stop a disease from spreading? If you are interested in these questions then being an “Illness investigator” or a Clinical Laboratory Scientist (CLS) might be the right career path for you. 

All cells, organs and tissues of a living organism are built of molecules. Some of them are small, made from only a few atoms. There is, however, a special class of molecules that make up and play critical roles in living cells. These molecules can consist of many thousands to millions of atoms. They are referred to as macromolecules (or large biomolecules).