DNA

An Italian court on Monday convicted three Egyptian security officials for their involvement in the 2016 kidnapping of Giulio Regeni, the Cambridge University student whose tortured body was found on a Cairo roadside days after he disappeared. The verdict is a landmark in Italy's years-long effort to establish accountability, though Egypt has consistently denied involvement and the defendants were tried in absentia.

Advances in DNA detection technology are allowing scientists to identify ever-smaller traces of genetic material. But as detection sensitivity improves, researchers face a new dilemma: distinguishing meaningful signals from contamination and background noise. The development is prompting debate in the scientific community about how to interpret ultra-sensitive genetic findings and what standards should apply.

A Nature study reports that the p53 protein, best known as a tumour suppressor, prevents chromothripsis — the shattering of chromosomes — by keeping transcription and DNA replication in balance. When p53 is missing or inactive, these processes collide, causing catastrophic genome damage that can drive cancer development. The finding links a classic cancer gene to a new mechanism of genome protection, and researchers say it may refine how tumour evolution and genome instability are understood.

The Israeli military says it is preparing for a possible Hamas attempt to kidnap soldiers along the Yellow Line, the ceasefire deployment line inside the Gaza Strip. The warning highlights continued tensions despite the truce, with troops deployed in the area said to be on heightened alert for ambush or abduction attempts.