Earth may be far more vulnerable to powerful solar storms than scientists realized, with extreme events potentially hitting modern technology twice as hard as previous models predicted.

Earth’s magnetic shield may not have the safety limit scientists once thought it did. New research suggests that the most powerful solar storms could disturb the planet’s upper atmosphere up to twice as severely as traditional estimates predict.

The finding challenges a decades-old assumption about how Earth responds when it is struck by unusually intense solar wind. Rather than reaching a maximum and leveling off, the planet’s geomagnetic response may continue growing as conditions become more extreme.

A new light-trapping architecture could lead to CMOS-compatible night-vision technology.

Azure Cosmos DB’s Gremlin flaw let Wiz escape the sandbox and retrieve an account key. Microsoft found no unauthorized activity outside Wiz’s testing.

Hidden instructions in a Word document can make Microsoft 365 Copilot rewrite figures in a report, then copy the same instructions into the finished file. Håkon Måløy disclosed the technique on July 28,144 days after reporting it to Microsoft.

In his proof of concept, the internally generated file triggered the same behavior when it was used in a second Copilot drafting session.

Måløy’s timeline says Microsoft confirmed the reported behavior on March 31 and deployed two mitigations. The first blocked the original prompt wording; the second upgraded the underlying model to GPT-5.5.

Engram cells are formed during learning and store memory information. However, little is known about the modulation of engram cells on time-dependent memory flexibility. Employing a male mouse model, we demonstrated that a temporal factor dictates the memory state, driving either pattern separation or pattern completion. Reengagement of engram cells in the dentate gyrus (DG) during memory retrieval in altered contexts was higher during pattern separation than during pattern completion, concomitant with a time-dependent reduction in synaptic transmission. Specific activation of DG engrams promoted pattern separation, whereas their inhibition accelerated pattern completion.