You might have felt it — the feeling that you’ve experienced something before, but, in reality, the experience is brand new. There are over 40 theories that attempt to explain the phenomenon of déjà vu. Michael Molina explains how neuroimaging and cognitive psychology have narrowed down the theories that could explain that feeling you’re having…again.
Ten years of satellite observations of greenhouse gases reveal that carbon dioxide in our atmosphere continues to increase despite international efforts to reduce carbon emissions. Satellites also show that recent methane increases are likely due to manmade emissions.
Vaccinating most of a population can provide fringe benefits for all. Why do your neighbor’s vaccinations help make you safer from infection? SA’s Dina Fine Maron takes a look at herd immunity and explains how it helps keep outbreaks at bay.
Have you noticed how the full moon looks bigger on the horizon than high overhead? Actually, the two images are exactly the same size — so why do we perceive them differently? Scientists aren’t sure, but there are plenty of intriguing theories. Andrew Vanden Heuvel unravels the details of focus, distance and proportion that contribute to this mystifying optical illusion.
Ever known someone to sleepwalk? Or maybe it’s even happened to you. Laci looks at why some people walk in their sleep, and puts to rest the question: is it safe to wake a sleepwalker?
An ultracold vacuum chamber ran a simulation of the early universe and came up with some interesting findings about how the environment looked shortly after the Big Bang occurred.
Flying machines are becoming smarter and more affordable: they are able to navigate in 3D and handle easy tasks by themselves. Will these drones rise to the challenge and help save lives among factory workers?
The PhytoKinetic Bus is the world’s first green-roofed public bus, now operating in Girona, Spain. The roof significantly lowered temperatures inside the bus by 3.5C.
Schizophrenia is one of the most complex and least understood of all psychological disorders. But now scientists have found a switch of sorts that could change everything.
NASA is developing an orbiting factory that will use 3D printing to build giant structures such as solar arrays and antennas up to 1.000 meters in length, as part of its search for extra-terrestrial life.