These meteorites contain all of the building blocks of DNA
Large Hadron Collider breaks new record only days after it reopens | Mysterious ceramic jars may actually be 900-year-old Crusader hand grenades | Mars helicopter photographs wreckage of its own landing gear in eerily desolate image
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After a three-year hiatus, the world's most powerful particle accelerator is back in business and already breaking records.
The Large Hadron Collider (LHC) — which is operated by the European Council for Nuclear Research (CERN) — is the world's largest particle accelerator and consists of a 17-mile (27 kilometers) ring of superconducting magnets buried between the border of France and Switzerland. LHC uses these magnets to accelerate and smash together protons and ions to almost the speed of light, to help scientists understand particle physics, including the origin of mass, dark matter and antimatter, according to CERN.
However, over the past three years, the LHC has been closed for maintenance and repairs.
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A fragmented ceramic container uncovered in Jerusalem may be an early version of a hand grenade that warriors used during the Crusades around 900 years ago, a new study suggests.
Researchers studied fragments of jars known as sphero-conical containers — small, rounded vessels with a pointed end and an opening at the top. The sphero-conical shape was a common design for vessels in the Middle East at the time, the researchers said in a statement. The containers were used for a wide range of purposes, including to hold oils, medicines and mercury, to drink beer from, and more.
The Mars helicopter Ingenuity has snapped eerily desolate photographs of the spent parachute and backshell that conveyed it to the Red Planet.
The unprecedented images, which look like scenes from an apocalyptic sci-fi movie, come courtesy of the little helicopter's 19th flight on Tuesday (April 26). They show the apparatus that protected the helicopter and the Perseverance rover as they made their hair-raising descent to the Martian surface on Feb. 18, 2021. NASA scientists hope the images will help them understand how the craft handled the descent and inspire future improvements to the process. The hope is that a future mission to Mars will be able to return samples collected by the Perseverance rover to Earth.
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The definition of a second, the most fundamental unit of time in our current measurement system, hasn't been updated in more than 70 years (give or take some billionths of a second).
But in the next decade or so, that could change: Ultraprecise atomic optical clocks that rely on visible light are on track to set the new definition of a second.
The next time you're fidgeting in an uncomfortable seat on a crowded train or airplane and wishing for a better way to travel, be grateful that you aren't a tardigrade. For these near-microscopic animals, getting from one place to another sometimes means being swallowed by a snail, riding in its guts and then exiting the mollusk via the anus, on a clump of feces.
Despite the obvious drawbacks of this arrangement, traveling by snail is certainly faster for a wee tardigrade than walking. Unfortunately, tardigrades have only about a 30% chance of surviving the trip, as they run the risk of being digested along the way, scientists discovered.
(Marie-Lan Taÿ Pamart, CC BY 4.0 , via Wikimedia Commons)
Three meteorites contain the molecular building blocks of DNA and its cousin RNA, scientists recently discovered. A subset of these building blocks had been detected in meteorites before, but the rest of the collection seemed mysteriously absent from space rocks — until now.
The new discovery supports the idea that, some four billion years ago, a barrage of meteorites may have delivered the molecular ingredients needed to jump-start the emergence of the earliest life on Earth, the researchers say.
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