The world of science has been buzzing with news of sinking cities, falling spacecraft, and waving cuttlefish. From the imminent crash of a Soviet-era spacecraft to the sinking of major U.S. cities, and the unique communication methods of cuttlefish, there is no shortage of fascinating discoveries to catch up on.
Let’s start with the space junk update. The Soviet-era spacecraft, Kosmos-482, launched in 1972, has been orbiting Earth for decades due to a suspected engine malfunction. Last week, researchers predicted that this spacecraft would make an uncontrolled descent back to Earth over the weekend. The potential landing zone for Kosmos-482 stretched across a wide range of latitudes, raising concerns about where it might crash. While there is a chance that the spacecraft could land in a populated area, it is more likely to break up in the Earth’s atmosphere or land in an uninhabited location. The fate of Kosmos-482 remains uncertain, but scientists are closely monitoring its descent.
Moving on to the sinking cities, a recent study published in the journal Nature Cities revealed that all 28 of the most populated cities in the U.S. are experiencing sinking, regardless of their location inland. Houston was identified as the fastest-sinking city, with significant portions of its area sinking at alarming rates each year. The primary cause of this sinkage is attributed to the extraction of groundwater for human use, with up to 80% of the observed sinking linked to this activity. The study highlighted the risks of uneven sink rates within a city, which can lead to structural damage and increased vulnerability to flooding. As cities face the dual challenges of increasing water needs and climate change-induced droughts, it is crucial for urban areas to adapt and mitigate these risks promptly.
In a surprising revelation, a study published in Nature Climate Change pointed out the disproportionate impact of the wealthiest individuals on climate change-related warming. The top 10% of the global population was found to be responsible for two-thirds of climate change-related warming due to their consumption and investments. The study emphasized the need for the wealthy to reevaluate their investments in high-carbon industries to reduce their contribution to climate change. With a growing awareness of the environmental impact of individual actions, there is a call for greater accountability among the affluent to address climate change.
Lastly, an intriguing study on cuttlefish behavior shed light on their unique communication methods. Researchers observed four distinct arm waves among cuttlefish, each serving a different communicative purpose. From the “up” wave to the “roll” move, cuttlefish use intricate arm gestures to convey messages to one another. This study provides valuable insights into the social interactions of these fascinating marine creatures and underscores the complexity of communication in the animal kingdom.
As we navigate the complexities of space exploration, urban development, climate change, and marine life, these scientific discoveries offer a glimpse into the wonders of the natural world and the urgent need for sustainable practices to protect our planet. Stay tuned for more updates on the latest advancements in science and technology. Cuttlefish have been observed using a fascinating form of communication through a series of unique signals. The “side” signal involves moving their arms to one side of their body, while the “crown” signal resembles someone steepling their fingers with squishy tentacles. The “up” sign is more complex, with arms extended upwards and twisting in front of the cuttlefish.
Scientists have witnessed cuttlefish exchanging these signals and sometimes responding with different signals, leading them to believe that this behavior is a form of communication. What is even more intriguing is that when researchers recorded cuttlefish signaling with an underwater microphone and played those vibrations for other cuttlefish, the second individual would mimic the signals. This suggests that cuttlefish may be sensing the vibrations of this sign language in addition to visual cues.
While researchers still need to establish a direct correlation between these signals and specific behaviors to definitively prove that cuttlefish are indeed communicating, the preliminary findings are both fascinating and adorable.
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This episode of Science Quickly is brought to you by Rachel Feltman, Fonda Mwangi, Kelso Harper, Naeem Amarsy, and Jeff DelViscio. Editing by Alex Sugiura, fact-checking by Shayna Posses and Aaron Shattuck, theme music by Dominic Smith. For more in-depth science news, subscribe to Scientific American.
This is Rachel Feltman for Scientific American, wishing you a fantastic week ahead!
