Each year, approximately a million pregnancies in the United States end in miscarriage, stillbirth, or the death of the newborn child.

An early application of genetic entineering to crop productions was the ice minus bacteria, one of the first releases of a genetically modified organism into an agricultural ecosystem.

the construction and subsequent maintainment of a bridge

The situation for 4-polytopes is fundamentally different from that for 3-dimensional polytopes. One reason is that there is no similar reduction of 4-polytope theory to a combinatorial (graph) problem.