These new stripes reveal a stark contrast between significant improvements in air quality across Europe and alarming deterioration in parts of Africa and central Asia. Cities like London ...

These drawings, which first appeared in the journal Advances in Protein Chemistry in 1981, became known as ribbon diagrams. Richardson’s drawing style was quickly adopted. Structural biologists ...

These new stripes reveal a stark contrast between significant improvements in air quality across Europe and alarming deterioration in parts of Africa and central Asia. Cities like London ...

This heart anatomy diagram shows that blood flows from the ... These arteries and their branches supply all parts of the heart muscle with blood. When the coronary arteries narrow to the point ...