The climate catastrophe that has struck southern Brazil, killing more than a hundred people and displacing nearly two million, has also spawned a spate of bizarre conspiracy theories, some involving jets' vapor trails and ...
Environment
21 hours ago
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43
The transition from the African humid period (AHP) to dry conditions in North Africa is the clearest example of climate tipping points in recent geological history. They occur when small perturbations trigger a large, non-linear ...
Earth Sciences
May 7, 2024
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55
An international team of researchers led by astronomers from Leiden University (Netherlands) has produced the first sharp radio maps of the universe at low frequencies. Thanks to a new calibration technique, they bypassed ...
Astronomy
May 6, 2024
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434
A study published in Opto-Electronic Science discusses high-intensity spatial-mode steerable frequency up-converter toward on-chip integration.
Optics & Photonics
May 1, 2024
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17
The Milky Way has a missing pulsar problem in its core. Astronomers have tried to explain this for years. One of the more interesting ideas comes from a team of astronomers in Europe and invokes dark matter, neutron stars, ...
Astronomy
Apr 29, 2024
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161
Many animals can glow in the dark. Fireflies famously blink on summer evenings. But most animals that light up are found in the depths of the ocean.
Plants & Animals
Apr 27, 2024
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42
A ghost is haunting our universe. This has been known in astronomy and cosmology for decades. Observations suggest that about 85% of all the matter in the universe is mysterious and invisible. These two qualities are reflected ...
Astronomy
Apr 26, 2024
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110
Scientists have introduced a form of quantum entanglement known as frequency-domain photon number-path entanglement. This advance in quantum physics involves an innovative tool called a frequency beam splitter, which has ...
Optics & Photonics
Apr 26, 2024
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943
Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), Chinese astronomers have investigated radio emission from a rotating radio transient known as RRAT J1854+0306. Results of the study, published April ...
Next-generation wireless signals will no longer emanate indiscriminately from a base station as is the case now but will likely take the form of targeted directional beams. However, any physical interference—an object or ...
General Physics
Apr 18, 2024
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