The Moon keeps a record that Earth often erases
Impact craters help scientists reconstruct a history of collisions. Their survival tells a different story on the Moon and on Earth.
Science
An old wall can hide more than one history
Archaeologists use layers, materials and context to establish how a site changed. Appearance alone rarely settles the age of a structure.
The colours in a microscope image are part of the evidence
Fluorescent markers can reveal structures that ordinary light cannot distinguish. Interpreting the image means understanding what each colour represents.