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Chemical traces preserved in ancient rocks indicate that marine environments were deteriorating long before the catastrophe that wiped out vast numbers of species at the end of the Triassic period, around 201 million years ago.
The post Ancient Oceans Began Losing Oxygen Millions of Years before End-Triassic Mass Extinction appeared first on Sci.News: Breaking Science News.
A newly discovered crocodile relative from the Triassic had a beak, tiny arms, and walked on two legs, making it look more like an ostrich-like dinosaur than a crocodile. During the Triassic Period, the ancestors of many modern animal groups were branching into an astonishing variety of shapes and lifestyles. Evolution was experimenting with body [...]
A study suggests pigeons navigate using iron-rich immune cells in their livers that can respond to Earth’s magnetic field. The findings may solve a decades-old mystery about bird navigation and reveal a surprising new sensory role for the immune system. Pigeons are famous for their ability to travel long distances and still find their way [...]
Scientists have uncovered a fish-hunting raptor from Patagonia that may have stalked prey like a giant prehistoric heron. A newly identified dinosaur from Patagonia is giving scientists fresh insight into how some raptor relatives lived during the final chapter of the age of dinosaurs. The species, named Kank australis, appears to have spent much of [...]
The transplanted pig organs functioned for 36 hours before showing signs of rejection
By tracking fierce winds racing through the atmospheres of seven ultra-hot Jupiters, astronomers have uncovered the strongest evidence yet that magnetic fields shape weather on worlds beyond our Solar System.
The post Astronomers Detect Clearest Signs Yet of Magnetic Fields on Extrasolar Planets appeared first on Sci.News: Breaking Science News.
China has unveiled the Z-21, a heavy attack helicopter that military analysts are comparing directly to the Boeing AH-64E Apache Guardian, the United States Army’s primary rotary-wing strike platform. The aircraft’s emergence marks a concrete step in China’s effort to field a domestically produced heavy attack helicopter capable of operating in high-intensity contested environments.
The Z-21 follows a tandem-seat, twin-engine configuration consistent with modern dedicated attack helicopter doctrine. Its airframe geometry — including stub wings for weapon pylons and a narrow fuselage cross-section — mirrors the layout optimized for survivability and aerodynamic performance in nap-of-the-earth flight.
The helicopter is reported to be powered by turboshaft engines developed domestically, a departure from earlier Chinese rotorcraft programs that relied heavily on foreign powerplant technology. Precise engine designation and shaft horsepower output have not been officially confirmed by the People’s Liberation Army (PLA).
The Z-21 is equipped with a chin-mounted cannon and provisions for air-to-ground missiles, anti-tank guided munitions, and unguided rocket pods across four hardpoints on its stub wings. Reports indicate integration of a millimeter-wave fire control radar — analogous to the Longbow radar mast system on the AH-64E — enabling over-the-horizon target acquisition and engagement in degraded visibility conditions.
A multi-spectral targeting system mounted in a nose turret is expected to provide infrared and day/TV imaging for precision engagement. These are capabilities the AH-64E has carried operationally for over a decade, meaning the Z-21 would be entering the field at a level of sensor maturity the Apache already surpasses in software and network integration.
The AH-64E Apache operates with Link 16 datalink compatibility, manned-unmanned teaming (MUM-T) with reconnaissance drones such as the MQ-1C Gray Eagle, and a target handoff system that allows crews to pass fire missions across platforms in near-real time.
Whether the Z-21 has achieved comparable network interoperability within PLA joint-force architecture remains unclear from available information.
On gross weight and payload, the Z-21 appears to fall in a similar class to the Apache’s roughly 10,400 lb (4,717 kg) maximum takeoff weight, though official Chinese specifications have not been released. This matters operationally: payload capacity directly constrains the missile and fuel load carried on a given mission profile, affecting both range and lethality.
The AH-64E incorporates radar-absorbent materials, infrared suppression on exhaust outlets, and a ballistically tolerant rotor system designed to sustain hits from 23 mm projectiles. It is not yet established whether the Z-21 meets comparable protection standards.
Engine reliability and maintenance logistics for domestically produced Chinese turboshafts also carry uncertainties, given the historical difficulties PLA aviation programs have faced in achieving consistent turbine performance at scale.
For readers interested in how rotary-wing platforms fit into broader strike architectures, the US Army’s Future Attack Reconnaissance Aircraft program offers relevant context on next-generation attack helicopter requirements being pursued in parallel.
The Z-21’s development fits within a wider PLA modernization effort that has prioritized closing capability gaps in close air support and anti-armor warfare. Taiwan Strait contingency planning, as well as high-altitude operations along the Sino-Indian border where the Z-10 medium attack helicopter has already deployed, likely informed the Z-21’s design requirements.
A heavier, more capable platform extends the PLA’s ability to conduct sustained attack helicopter operations in mountainous or fortified terrain where ordnance load matters.
Until the Z-21 completes operational testing and enters confirmed PLA service, claims about its combat effectiveness relative to the AH-64E remain speculative. The gap between a prototype photograph and a battle-ready weapons system in serial production is one that Chinese aerospace programs have historically taken years to close.
Microsoft’s announcement of a new quantum computing breakthrough with its Majorana 2 chip continues a trend of bold claims followed by scant evidence
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