In Depth - NASA Science (.gov)

Engineers introduce a 3D-printed, hybrid aluminum-and-rubber cloaking device that blocks an object’s thermal signature by guiding heat around it, rendering it invisible to infrared cameras. Credit: University of Illinois Urbana-Champaign. An object doesn’t have to be visible to give away its location. Sometimes, the way it disrupts the flow of heat is enough to reveal that something is hiding there, much to the despair of camouflaged soldiers who have to endure thermal vision drones on the battlefield. Now, engineers have developed a device that can make that thermal signature almost disappear (although sadly it won’t work for infantry).

The Orion Nebula is a large star-forming region visible to the naked eye. Some of the young stars in the nebula are surrounded by disks of gas and dust in which planets form. Radiation from the massive central star, 1 Ori C1 (Theta-1 Orionis C1), gradually strips material from these disks, giving them shapes that resemble tadpoles. The disks are losing mass so rapidly that, given the age of the stars (around 1 million years), they should have disappeared long ago. The large gas shell surrounding the central star poses another puzzle. The star sets the surrounding gas in motion, causing the shell to expand at around 13 kilometers per second (8 miles per second).

"What makes SPRIZ so unexpected is that it uses a familiar mechanism—a tether—to do something different: it connects the two mitochondrial membranes while acting as a rigid pillar that holds them a set distance apart, so the room between them keeps a defined height," explains Dr. Luca Pellegrini, full professor at the University of Ottawa, who led the study. Credit: Faculty of Medicine, University of Ottawa Mitochondria are the tiny powerpacks that supply most of the energy our cells need. Their ability to generate this energy relies on a distinctive architecture: two membranes, one tucked inside the other, separated by a narrow gap called the intermembrane space (IMS). This tiny space helps sustain the chemistry of energy production, making its organization critical to how these cellular powerpacks function.

Young chimpanzees enjoy some fruit. (Martin Harvey/The Image Bank RF/Getty Images) Humans and chimpanzees are remarkably similar, despite the major differences in how our societies have panned out. After about 5-6 million years of evolution from a common ancestor, only 1.2 percent of our DNA is different. A virus that infected chimpanzees (Pan troglodytes) – but not humans – about 4 million years ago is partly responsible. This ancient retrovirus made a tiny tweak to chimp DNA that has led to some major differences in how our brains develop, according to a new study published in Science Advances today. "We wanted to understand how human and chimpanzee brains could have evolved differently when so many of their protein-making genes are similar," lead author Patricia Gerdes told ScienceAlert. Gerdes is a molecular neurogeneticist at Lund University in Sweden. "We knew that ancient viruses can leave DNA behind in the genome, and those remnants can affect nearby genes," she said. "PTERV1 (Pan troglodytes endogenous retrovirus-1) was a particularly interesting candidate because it is found in chimpanzees and other African apes but not in humans.

This incredible composite image of Orionid meteors was captured as Earth passed through the debris trail shed by Halley's Comet.

As It HappensScientists at Stanford University in California stumbled on a promising discovery when two coral fragments in the lab — one bleached and one healthy — tipped over in a tank and touched.'This could open a door to possible reef restoration,' says Stanford researcherSheena Goodyear · CBC News · Posted: Oct 23, 2026 1:37 PM EDT | Last Updated: 28 minutes agoListen to this articleEstimated 5 minutesThe audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. Scientists at Stanford University in California found that when a bleached coral fragment makes contact with a healthy one, the dying fragment can make a full recovery. (Danny Collins)The best medicine for a dying coral may be the power of touch. Scientists at Stanford University in California stumbled on a promising discovery when two coral fragments in the lab — one bleached and one healthy — tipped over in a tank and touched.