How old is that fingerprint?

Forensic dramas on TV make it seem easy to determine when fingerprints were left at the scene of a crime. In reality, the oils in fingerprints degrade over time, and it's difficult to figure out their age. Now, researchers ...

Millions of farmers put their faith in God when making decisions

A widespread belief among millions of smallholder farmers in one of the world's poorest countries is that God determines their yields. This is shown by a study from the University of Copenhagen that has examined the correlation ...

The strange behavior of sound through solids

Not everything needs to be seen to be believed; certain things are more readily heard, like a train approaching its station. In a recent paper, published in Physical Review Letters, researchers have put their ears to the ...

Examining what killed the dinosaurs in depth

Determining what killed the dinosaurs 66 million years ago at the end of the Cretaceous Period has long been the topic of debate, as scientists set out to determine what caused the five mass extinction events that reshaped ...

Electron slow motion: Ion physics on the femtosecond scale

How do different materials react to the impact of ions? This is a question that plays an important role in many areas of research—for example, in nuclear fusion research, when the walls of the fusion reactor are bombarded ...

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