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July 28: Scientists continue to uncover remarkable similarities between Earth and Saturn's largest moon, Titan, where rivers, rainfall, lakes and seas exist despite temperatures cold enough to freeze water into rock like ice. Titan is the only known world besides Earth with an active hydrological cycle, but instead of water, the entire system runs on liquid methane and ethane. Methane evaporates from lakes and seas, forms clouds, falls as rain and flows through river channels before collecting in vast polar seas. According to observations from NASA Cassini mission and the European Space Agency's Huygens probe, Titan's methane rain falls much more slowly than rain on Earth because of the moon's dense atmosphere and weak gravity, making the droplets descend almost like snowflakes. R...

July 28: Researchers are raising concerns that plastic materials used in modern construction are contributing to microplastic pollution in rivers, where the particles are increasingly being detected in freshwater fish. Concrete and construction materials are used extensively worldwide, with the construction sector consuming an estimated 17–20% of global plastic production. Plastics such as polyethylene terephthalate (PET), polypropylene (PP) and polyvinyl chloride (PVC) are commonly incorporated into waterproof coatings, fiber reinforcement, insulation, pipes and composite building materials to improve durability and performance. Scientists say these materials gradually break down through weathering, cutting, grinding and other construction activities. During rainfall, stormwater run...

New Delhi, July 27: India is set to witness widespread heavy rainfall over the coming days as two active monsoon systems a depression over the northwest Bay of Bengal and a low pressure area over west Rajasthan continue to strengthen the India Meteorological Department (IMD) said. Satellite images from INSAT-3DR captured on July 26 show the Bay of Bengal depression developing into a dense cloud mass with extremely cold cloud tops, indicating intense thunderstorm activity. At the same time, the Arabian Sea is supplying large amounts of moisture through strong southwesterly winds, fuelling rainfall over western and central India. The monsoon depression was centred near 20.6°N and 88.4°E, around 130 kilometres off West Bengal's Sagar Island on Saturday morning. According to the IMD, the...

A new study has found that river pollution is causing two closely related swordtail fish species in Mexico to interbreed, creating hybrid populations and raising concerns about the loss of biodiversity. Researchers from Stanford University studied four rivers in Mexico Huasteca region and found that pollution downstream from a small town had disrupted the ability of two native fish species the highland swordtail (Xiphophorus malinche) and the sheepshead swordtail (Xiphophorus birchmanni) to distinguish potential mates. The research showed that polluted waters contained higher levels of nitrates, phosphates and heavy metals, including copper, lead and cadmium, along with increased turbidity. These environmental changes were linked to physical damage in female fish, particularly to the...

A new study from South Africa has found that parks, community gardens and other public green spaces can play a crucial role in helping cities adapt to climate change while strengthening community resilience. Researchers from the University of Pretoria examined three public spaces in Tshwane, South Africa's fourth largest city, to understand how urban green spaces help communities cope with rising temperatures, flooding and other climate related challenges. The study found that parks and community gardens not only reduce urban heat and improve flood management but also serve as important social infrastructure by bringing people together, strengthening community networks and supporting vulnerable populations. One of the sites studied, Moja Gabedi, was transformed from an illegal dum...

Bhutan continues to stand out as one of the world's few carbon negative countries, absorbing significantly more carbon dioxide than it emits through its extensive forest cover and long standing environmental conservation policies. According to Bhutan latest greenhouse gas inventory, the country emitted about 1.74 million tonnes of greenhouse gases in 2022, while its forests and other land based ecosystems absorbed nearly 11.45 million tonnes. This resulted in net negative emissions of around 9.71 million tonnes of carbon dioxide equivalent. The country's forests play a central role in maintaining its carbon negative status. More than 70% of Bhutan's land area is covered by forests, which act as natural carbon sinks by removing carbon dioxide from the atmosphere. Bhutan Constitution a...

Scientists have uncovered evidence of a long term natural climate regulation mechanism that may have helped keep Earth temperatures stable for the past 60 million years by controlling how much carbon dioxide remained in the atmosphere. The study published in the Proceedings of the National Academy of Sciences (PNAS), suggests that interactions between sea level, ocean oxygen, phosphate availability and carbon burial acted as a natural "thermostat" that moderated Earth's climate over millions of years. Researchers from the University of Oxford and Syracuse University found that changing sea levels influenced the amount of phosphate available in the oceans. Phosphate is an essential nutrient for marine organisms, and its availability affected marine productivity and the burial of organ...

The Colombian city of Medellín has emerged as a global example of climate adaptation after planting approximately 880,000 trees and more than 2.5 million shrubs and other plants under its Green Corridors programme, significantly reducing urban temperatures and improving environmental quality. Launched in 2016, the initiative transformed roadsides, parks, riverbanks and public spaces into interconnected green corridors to combat the city's growing urban heat island effect. Medellín, located in the Aburrá Valley, had experienced rising temperatures as rapid urbanisation replaced vegetation with buildings, roads and paved surfaces that absorb and retain heat. According to scientific assessments, the large-scale greening programme reduced average air temperatures across the city by aroun...

  July 27: Lake Baikal in southern Siberia contains more fresh water than all five North American Great Lakes combined, despite covering a much smaller surface area, highlighting the extraordinary geological features that make it the world's largest freshwater lake by volume. According to geological data, Lake Baikal holds approximately 23,000 cubic kilometres of freshwater around 20% of the world's unfrozen surface freshwater. In comparison, the combined water volume of Lakes Superior, Michigan, Huron, Erie and Ontario is about 22,700 cubic kilometres. Although the Great Lakes together span nearly 244,000 square kilometres, Lake Baikal covers only about 31,700 square kilometres. Scientists say its immense water storage is the result of its exceptional depth rather than its s...

  A new study led by researchers from the University of Adelaide has uncovered evidence that several of K’gari’s iconic freshwater lakes, located on the world’s largest sand island in Australia, dried up around 7,500 years ago despite the region experiencing higher than average rainfall. The findings, published in the Journal of Quaternary Science, challenge the long-held assumption that abundant rainfall alone is enough to sustain the island’s freshwater lakes. Researchers say changing wind patterns and rainfall distribution may have played a crucial role in the disappearance of the lakes, raising concerns about their future under climate change. By analysing ancient sediment cores collected from some of K’gari’s oldest lakes, scientists found that sediment layers were missi...