The Aurora PD’s four-episode special will share the story of the 2016 cold case murder of Chelsea Yasser in hopes of eliciting new tips from the public
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The Aurora PD’s four-episode special will share the story of the 2016 cold case murder of Chelsea Yasser in hopes of eliciting new tips from the public
City leaders in Blackduck, a town of 800, voted unanimously to close down its police department, which was founded in 1910
Long-duration gamma-ray bursts are some of the most energetic events in the universe, releasing more energy in just a few seconds than the sun emits in 10 billion years. Los Alamos National Laboratory scientists, having discovered gamma-ray bursts more than 50 years ago, continue to add to the understanding of these mysterious events.
Sending a spacecraft to the underexplored planet Uranus is at the top of many planetary scientists’ wish lists. But which spacecraft-mounted instruments would be most useful for answering questions about the mysterious ice giant?
Physicists at UC Santa Cruz and other institutes across California and New Mexico have developed a detection system that will allow next-generation particle accelerators to better reveal fundamental biological and chemical processes, as well as advance critical areas such as materials science and energy research.
Southwest Research Institute (SwRI) scientists studying the inner main-belt asteroid Donaldjohanson have found that its rotation wobbles. Rather than rolling through space in a steady pattern, Donaldjohanson turns on two axes, rotating end over end once every 10.5 Earth days while wobbling around its horizontal axis every 26.5 days. The findings are published in the journal Science.
Researchers at the National Graphene Institute, in collaboration with the National University of Singapore, have shown that the magnetic behavior of electrons in graphene can be precisely controlled using electricity, revealing unusually large spin signals in a carefully engineered graphene system.
Experiments at Lawrence Livermore National Laboratory’s National Ignition Facility (NIF) require breathtaking precision. Each of the 192 lasers is focused to a width of a few millimeters to enter a 3-millimeter hole at the top or bottom of a 2-centimeter (0.8-inch) gold canister known as a hohlraum.
How does light turn into motion within a metal? A team of researchers from European XFEL, the University of Potsdam and other participating institutions has shown that ultrashort optical laser pulses can trigger extremely rapid lattice vibrations in periodically layered metal structures—not primarily by heating the atomic lattice, but through the pressure exerted by hot electrons. The results are published in Nature Communications.
A new study of two supernova remnants, the debris left behind after stars explode, suggests the explosions came from stellar siblings that once orbited each other. The first star’s detonation sent its binary companion hurtling through space, and then, after traveling for thousands of years, the surviving star blew up, too.
Finding life beyond our solar system is a major goal of modern astronomy. NASA’s planned Habitable Worlds Observatory (HWO) aims to take direct images of Earth-sized planets around stars other than our sun. This task, however, is extraordinarily difficult, given that these planets are roughly 10 billion times fainter than their host stars. To detect them, scientists must find ways to suppress nearly all of the nearby starlight, which would otherwise overwhelm the faint planetary signal.
Millions of light-years away, millions of years ago, a star exploded. In this violent process, it ejected incredible amounts of mass, including carbon, nitrogen and oxygen—the building blocks of life. In fact, the star may have produced elements on the periodic table all the way up to iron. As it exploded, it spewed these elements into deep space. Only a burnt-out core remained.
This NASA Hubble Space Telescope image features a galaxy cluster called CL0016+1609, or MACS J0018.5+1626, that is very bright at X-ray wavelengths and is one of the most extensively studied clusters at X-ray and radio wavelengths. X-ray observations of this cluster revealed that it is two clusters merging along our line of sight.
Billions of years ago, environmental conditions on Mars were significantly more hospitable than they are today. Our neighboring planet was likely warm, humid and surrounded by a dense atmosphere. Whether simple microorganisms could have evolved at that time remains an open question.
Ultrasound-based irradiation of rock formations has attracted considerable attention as a technique for enhancing heavy-oil (high-viscosity crude oil) recovery from deep underground reservoirs. However, a unified theoretical framework for wave propagation and energy dissipation in these formations remains lacking because water coexists with heavy oil within rock pores, and gas bubbles in the water respond dynamically to ultrasonic excitation, thereby creating a complex system.
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