HealthGum disease and Alzheimer's: Your questions answered People are questioning a landmark study suggesting that a bacterium involved in gum disease may also cause Alzheimer's. Here's what you need to know about the study Analysis
SpaceSpace art could be so much more than a shiny satellite in the sky Orbital Reflector, a giant balloon that will inflate in Earth’s orbit and reflect the sun’s light, is the latest attempt at large-scale art in space. But space art should do more than mimic the stars Analysis