Memories

May and Roi Lizer went out to celebrate a birthday in Tel Aviv, but the outing ended with the theft of Roi's phone. According to them, the device contained photos and final conversations with their brother Nehorai, who was killed about two months ago by a Hezbollah suicide drone in Lebanon. Now they are pleading: "We must have the phone back."

We tend to think that a forgotten memory is like a file permanently deleted from a computer, but scientists have discovered that reality is much more complex. A new study published in the scientific journal Nature Neuroscience shows that in fruit flies, memories we thought had disappeared completely actually remain hidden deep in the brain, ready to come to life as soon as we receive the right...