Growth conditions and strains All the strains, phages, plasmids and oligonucleotides used in this study are listed in Supplementary Table 4. The sequences of all plasmids were confirmed by whole-plasmid sequencing. All bacterial strains were E. coli MG1655 derivatives unless noted otherwise. All λ strains in this study had mutations in the cI repressor and/or
As part of a Golden Age of exploration and discovery, NASA announced Friday the agency is increasing its cadence of missions under the Artemis program to achieve the national objective of returning American astronauts to the Moon and establishing an enduring presence. This includes standardizing vehicle configuration, adding an additional mission in 2027, and undertaking at least one surface
Sacramento, J., Bengio, Y., Costa, R. P. & Senn, W. Dendritic cortical microcircuits approximate the backpropagation algorithm. In Proc. 32nd International Conference on Neural Information Processing Systems (eds Bengio, S. & Wallach, H. M.) 8735–8746 (ACM, 2018). Payeur, A., Guerguiev, J., Zenke, F., Richards, B. A. & Naud, R. Burst-dependent synaptic plasticity can coordinate learning
Mars is not what it used to be. Once warm, watery, and blanketed by a thick atmosphere, today the Red Planet is cold, dry, and draped by a thin atmospheric veil. The main culprit is a relentless stream of particles from the Sun, known as the solar wind. Over billions of years, the solar wind has stripped away
At the core of Isaacman’s concerns is the low flight rate of the SLS rocket and Artemis missions. During past exploration missions, from Mercury through Gemini, Apollo, and the Space Shuttle program, NASA has launched humans on average about once every three months. It has been nearly 3.5 years since Artemis I launched. “This is
Six planets will parade across the sky this weekend in a rare celestial spectacle, experts have said. For the next few days, Jupiter, Saturn, Venus, Mercury, Neptune and Uranus will all be visible at the same time in the night sky – although binoculars or a telescope will be needed to spot the latter two
This striking image from the science camera on ESA’s Jupiter Icy Moons Explorer (Juice) shows interstellar comet 3I/ATLAS spewing dust and gas. The tiny nucleus of the comet (not visible) is surrounded by a bright halo of gas known as the coma. A long tail stretches away from the comet, and we see hints of
Mice were given acetate and then performed tasks that tested their memory.Credit: fergregory/iStock via Getty A common metabolic by-product produced when the body breaks down alcohol, glucose and food high in fibre can enhance memory, at least in females, according to a study in mice1. In the study, published in Science Signaling, scientists injected acetate
A total lunar eclipse will create a stunning “Blood Moon” on March 3 (Credit: Jacek Rużyczka/ CC BY-SA 4.0/ Wikimedia Commons) Skywatchers are in for a treat. On March 3, 2026, a spectacular total lunar eclipse will turn the Moon a deep reddish color, creating what is known as a “Blood Moon.” The eclipse will
Seeing a color in nature is one thing. Recreating colors artificially is an entirely different challenge—one with some unexpectedly high stakes. Practically anything human-made is of a certain color thanks to artificial pigments, or chemical compounds that appear a specific color. An ongoing challenge is that, as chemical bonds naturally fade, so does the color.