How 'glowing' plants could help scientists predict flash drought
An unusual boost in plant productivity can foreshadow severe soil water loss, and NASA satellites are following the clues.
An unusual boost in plant productivity can foreshadow severe soil water loss, and NASA satellites are following the clues.
Earth Sciences
May 14, 2024
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70
The first and the best-known metallocene is "ferrocene," which contains a single iron atom. Today, sandwich complexes can be found in many inorganic chemistry textbooks, and the bonding and electronic structure of metallocenes ...
Analytical Chemistry
May 14, 2024
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238
Last week, a huge solar flare sent a wave of energetic particles from the sun surging out through space. Over the weekend, the wave reached Earth, and people around the world enjoyed the sight of unusually vivid aurora in ...
Planetary Sciences
May 13, 2024
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33
Across much of the United States, spring is in full force. With warmer weather, people are taking their furry family members out on longer walks and spending more time outside. Alongside blooming flowers and trees, your pet ...
Veterinary medicine
May 9, 2024
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2
The author of a disaster novel couldn't have dreamed it up any better: On a Friday, the thirteenth of all days, the potentially dangerous asteroid (99942) Apophis will come extremely close to humanity.
Planetary Sciences
May 8, 2024
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30
One of the oldest known meteor showers is streaking through the sky above California. The Lyrid meteor shower was first recorded in 687 B.C. and has been studied for more than 2,000 years, according to NASA. The meteor shower ...
Space Exploration
Apr 22, 2024
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82
If you're a fan of all things space, you've doubtless heard about the "devil comet," which has been captivating keen-eyed observers in the northern hemisphere for the past few weeks. Now it's our turn, as comet 12P/Pons–Brooks ...
Astronomy
Apr 19, 2024
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7
Eyes are organs that detect light, and send signals along the optic nerve to the visual and other areas of the brain[citation needed]. Complex optical systems with resolving power have come in ten fundamentally different forms, and 96% of animal species possess a complex optical system. Image-resolving eyes are present in cnidaria, molluscs, chordates, annelids and arthropods.
The simplest "eyes", such as those in unicellular organisms, do nothing but detect whether the surroundings are light or dark, which is sufficient for the entrainment of circadian rhythms. From more complex eyes, retinal photosensitive ganglion cells send signals along the retinohypothalamic tract to the suprachiasmatic nuclei to effect circadian adjustment.
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