It’s your perception of sleep that’s making you feel tired all day

• Comet C/2025 R3 (PanSTARRS) is brightening in the night sky and could become visible to the naked eye after April 13, with observations in early April showing it at magnitude 6, approaching naked-eye visibility thresholds. • Light-curve data from the Comet Observation database indicates the comet could brighten to approximately magnitude 4 in coming weeks as it approaches perihelion on April 20, when it will pass within 47.4 million miles from the sun. • The comet will make its closest approach to Earth on April 27 at approximately 44 million miles distant, with close approaches to the sun typically increasing comet activity and brightness as ice sublimates into glowing gas.

• Climate scientists have discovered that nitrous oxide, a key greenhouse gas, has a shorter atmospheric lifetime than previously modeled, decreasing more rapidly than expected. • This unexpected finding is significantly altering climate projections and forcing researchers to recalibrate their long-term climate models and predictions. • The discovery underscores the importance of continuous monitoring and reassessment of greenhouse gas behavior in the atmosphere, with implications for future climate policy and environmental planning.

• The Artemis II crew completes its historic lunar flyby mission, with crew members returning to Earth on April 10 after traveling farther from Earth than any humans in decades. • During the mission, the crew captured unprecedented photographs of Earth passing behind the Moon and observed portions of the lunar surface never previously seen by human eyes. • The mission marks a major milestone in NASA's Artemis program, re-inspiring public interest in space exploration through iconic imagery showing Earth's perspective from unprecedented distances.

• Arizona State University's Extreme Environments Lab tests semiconductor technologies under harsh conditions mimicking those in low Earth orbit, where temperatures swing from minus 85°F to over 250°F and radiation exposure exceeds 100 times natural Earth levels annually. • The lab supports the Southwest Advanced Prototyping (SWAP) Hub, serving government and industry partners designing technologies for demanding applications including space stations, missile defense systems, and geothermal energy equipment. • This research capability extends to supporting radiation therapy, nuclear energy systems, and advanced scientific tools such as quantum computers, addressing critical reliability challenges for space-based microchips that cannot be serviced for a decade or more.

• A new study in Big Earth Data introduces CA-MTransUNet, a Cloud-Aware Mixture-of-Experts Linear Transformer U-Net for forest burned area (FBA) detection using Sentinel-1 SAR and Sentinel-2 optical data. • The model attains the highest mean Intersection-over-Union (mIoU) of 87.00% with an inference speed of 6.26 ms, outperforming benchmarks despite cloud contamination. • This breakthrough addresses computational complexity in segmentation models, enhancing post-fire environmental monitoring critical for climate studies.

• NASA's Artemis II mission surpassed the Apollo 13 record on April 6, 2026, at 1:57 p.m. EDT, reaching beyond 248,655 miles (400,171 km) from Earth as the Orion capsule 'Integrity' looped around the moon's far side. • The mission will peak at 252,760 miles (406,777 km), breaking the prior record by 4,100 miles (6,600 km) during its six-hour lunar flyby, marking the first crewed deep-space mission since Apollo. • This milestone validates life-support systems, navigation, and thermal protection for humans, paving the way for sustained lunar presence under the US Artemis program.

• Researchers from Binghamton University and University of Virginia developed a machine-learning system that analyzed over 55 million scientific papers and patents to identify truly disruptive research that changes the direction of science. • The new metric, published in Science Advances, measures "disruptiveness" — the degree to which a paper pulls a field away from its earlier path — and successfully identifies major simultaneous discoveries often overlooked by traditional citation-based measures. • The study addresses a critical gap in how science evaluates impact, recognizing that scientific progress occurs through abrupt changes rather than incremental steps, helping identify overlooked breakthrough moments in research history.

• A paralyzed man successfully controlled a robotic arm by using a neural interface device that relays signals from his brain to a computer, enabling him to grasp, move, and drop objects through thought alone. • The breakthrough demonstrates the practical application of brain-computer interface technology, allowing the patient to perform complex motor tasks that were previously impossible due to paralysis. • This advancement represents a significant milestone in neurotechnology and rehabilitation, offering hope for individuals with paralysis by restoring functional control of external robotic limbs through neural signals.

• The Nuclear Regulatory Commission granted final approval for Diablo Canyon nuclear power plant to continue operations through 2030, concluding a three-year regulatory review process. • This decision represents a significant policy shift regarding nuclear energy in California and demonstrates regulatory confidence in the plant's safe operation and maintenance standards. • The approval reflects broader national conversations about nuclear energy's role in meeting energy demands and climate goals, particularly as the U.S. seeks to expand clean energy capacity.

• NASA's Artemis II mission has reached a critical point of no return, with the Orion spacecraft performing its trans-lunar injection burn and now headed toward the Moon. • The mission represents a major milestone in NASA's efforts to return humans to lunar exploration after decades since the Apollo program. • Artemis II serves as a crucial test flight for the Space Launch System and Orion capsule before planned crewed lunar landings.

• The MajesTEC-3 clinical trial led by UAB researchers demonstrates that a new two-drug immunotherapy regimen can lead to long-lasting remission for multiple myeloma patients. • Over 83 percent of patients enrolled in the trial remain alive and progression-free three years after therapy, supporting approval of this potentially curative treatment. • The findings represent a significant advance for multiple myeloma, a blood cancer with limited treatment options historically.

• Scientists warn that rapid advances in artificial intelligence and neurotechnology are advancing faster than our scientific understanding of consciousness, creating serious ethical risks. • The acceleration of AI capabilities and brain-computer interface technologies raises urgent questions about the nature of consciousness and ethical implications. • Researchers emphasize the need for parallel development of ethical frameworks to accompany technological progress.