Cease-fire talks between Israel and Hamas may resume today in Cairo, mediated by Egypt. Israel has lowered its demand for the release of hostages, raising hopes for a deal. President Biden has reached out to Egypt and Qatar to pressure Hamas. Meanwhile, Russia advances in Ukraine as the U.S. rushes military aid. Elon Musk secures a deal in China for Tesla's advanced self-driving software. In other news, Cuba embraces private entrepreneurs to cope with its economic crisis. Scientists study "super-agers" with remarkable memory, and physical fitness is linked to improved mental health in children. For more, visit nytimes.com.