Like a recording artist who has had a long career, NASA's Chandra X-ray Observatory has a "back catalog" of cosmic recordings that is impossible to replicate. To access these X-ray tracks, or observations, the ultimate compendium has been developed: the Chandra Source Catalog (CSC).
Within the S&P 500, only a small fraction of chief executive officers speak with an accent or come from foreign backgrounds. The figure hovers around 10%. However, their share of the market is substantial.
Child sexual abuse cases involving female perpetrators are confronting and distressing. When these cases make the news, they often provoke shock and outrage.
For the first time, physicists have generated and observed stable bright matter-wave solitons with attractive interactions within a grid of laser light.
In a study published in Telestes, Dr. Joshua Kumbani and Dr. Margarita Díaz-Andreu categorized the various dance scenes depicted in South African rock art, drawing on ethnographic sources, published studies, and the comprehensive SARADA database to identify dance scenes, thus capturing this invaluable archive for the understanding of the San's various cultural practices.
For a long time, scientists assumed that Earth's water was delivered by asteroids and comets billions of years ago. This coincided with the Late Heavy Bombardment (ca. 4.1 to 3.8 billion years ago), a period when planets and bodies in the solar system experienced a much higher rate of impacts.
Researchers have discovered how bacteria break through spaces barely larger than themselves, by wrapping their flagella around their bodies and moving forward. Using a microfluidic device that mimics insect gut channels, the team revealed a remarkable "flagellar wrapping" motion that lets symbiotic bacteria pass through 1-micrometer-wide tunnels. Genetic manipulation and mathematical calculation showed that the flexibility of a tiny joint in the flagellum, called the hook, is crucial for this screw-like movement and even determines whether the bacteria can successfully infect their insect hosts.
Global food trade is essential for food security, but its ecological consequences often remain unseen. A new data paper published in One Ecosystem introduces a global long-term dataset, quantifying biodiversity loss embodied in the international trade of staple food crops. As such, this dataset offers a novel perspective on how food trade redistributes environmental pressures worldwide.
Quantum computers, systems that process information leveraging quantum mechanical effects, will require faster and energy-efficient memory components, which will allow them to perform well on complex tasks. Superconducting memories are promising memory devices that are made from superconductors, materials that conduct electricity with a resistance of zero when cooled below a critical temperature.
Millions of years of isolation have shaped Australia's extraordinary mammal fauna into species unlike anywhere else in the world, from platypus to koalas and wombats. Tragically, Australia is the world leader in mammal extinctions.
