LU STOUT: Welcome back. Vietnam's capital Hanoi is a bustling city with millions of people, so finding a quiet place to relax can be a challenge. On today's Hanoi POV, a writer shows us the local haunt he visits to put his mind at ease.</s>NGUYEN QUI DUC, VIETNAMESE-AMERICAN WRITER AND JOURNALIST: My name is Nguyen Qui Duc. I grew up in Vietnam. I left at the end of the war in 1975. Most people think of me as a writer or a former journalist. But really, in my adult life,</s>LU STOUT: It's really, really appealing. Now the Great Pyramid of Giza has another secret waiting for archaeologists. It turns out there is a mysterious empty space in the tomb. The mission ScanPyramids picked up a 30-meter long void using a new particle tracking technique. It's right above the queen's chamber. A smaller one is down below. This is the first major discovery inside the pyramid since the 19th century. Researchers say it's probably not another burial chamber. It will take some time before they can find out. Any kind of drilling is banned. So the secrets in the room will stay sealed in stone for a while. Astronauts are spending more and more time in space and we're only beginning to learn what that does to the human body. Now, a new study published at The New England Journal of Medicine shows how floating in zero gravity can actually squeeze the brain. And it is pretty shocking when you see it on an MRI scan. On the left here, an astronaut's brain before the mission. And on the right, after long-term space flight. Researcher explains how increased cerebral spinal fluid in the head squeezes the brain and makes the space between brain regions appear smaller. Lead author of the study says a disturbance in the balance of the fluid can cause changes in cognitive brain function but more research needs to be done to find out how long lasting those changes might be. That is "News Stream." I'm Kristie Lu Stout, but don't go anywhere, "World Sport" with Christina Macfarlane is next.
Hanoi POV; Mysterious Chamber Found in Great Pyramid of Giza; Study: Spaceflight "Squeezes" the Brain.