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 desk
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.
Why the forecast becomes less certain further into the week
Small differences in the atmosphere can grow over time. Forecast ensembles help describe the range of possible outcomes rather than hiding it behind a single symbol.
The same rain can have very different effects on the ground
Intensity, soil conditions and the shape of a catchment influence how quickly water reaches a stream or a street. A daily rainfall total tells only part of the story.
Autumn colour is chemistry made visible
As green chlorophyll breaks down, other pigments become easier to see. The timing and intensity of the display depend on the tree and its environment.