| The particular tablet which interests us here investigates how to calculate the radius of a circle through the vertices of an isosceles triangle. |
| Penumbra's special correspondent investigates the secrets of life and of adulterine children, using DNA fingerprinting. |
| The same study investigates the question whether executions deter crimes of passion and murders by intimates. |
| In book two Apollonius investigates how hyperbolas are related to their asymptotes, and he also studies how to draw tangents to given conics. |
| Javier investigates the economic and political impact of Mexican migrants in the US on their home country. |
| The author revisits the concept and plans for the facility, and investigates the economics and politics of the time that lead to its demise. |
