All articles tagged with #color change
A rare rainforest katydid, Arota festae, starts life bright pink and gradually shifts to green over about two weeks, likely as camouflage that tracks the leaves’ delayed greening in tropical forests, a survival strategy observed on Barro Colorado Island, Panama.
In 2025, Lake Eyre in South Australia experienced significant filling due to heavy rains, followed by rapid evaporation that revealed striking green and reddish hues caused by salt-loving microorganisms, with the lake's water levels and colors changing dynamically based on environmental conditions.
A family’s black Labrador named Beobi developed white patches over her body due to vitiligo, transforming her appearance from black to a panda-like pattern over two years, which her family finds endearing and unique.
Comet 3I/ATLAS, the third known interstellar visitor to our solar system, has not actually changed color; it only appeared to do so once when its gas coma became bright earlier this year. Despite media reports suggesting multiple color changes, scientists clarify that the comet's appearance has remained consistent, with its blue-green coma visible since early September. The comet continues to be a fascinating object for observation and study as it passes through our cosmic neighborhood, with closest approach to Earth on December 19.
New observations suggest that the interstellar comet 3I/ATLAS may be turning blue for the third time, possibly due to gas leaks, after a brightening event; its color changes have been temporary and further study is ongoing as it approaches Earth.
Astronomers studying interstellar comet 3I/ATLAS have observed it changing color, brightening significantly, and showing signs of non-gravitational acceleration as it approached perihelion, indicating unusual cometary behavior and mass loss, with many aspects still to be understood.
Scientists investigated why Bayley Hazen Blue cheese, traditionally mottled green, turned white over a few years, discovering microbial changes in the cheese's rind that caused the color shift.
Scientists have discovered that blue sharks use nanostructures in their skin, specifically guanine crystals and melanin vesicles, to produce their vivid blue color and potentially shift it based on environmental factors like water pressure, which could aid in camouflage and inspire bio-inspired engineering solutions.
A study by biologists Sofie C. Sonner and Kirt L. Onthank reveals that the rapid color-changing ability of octopuses is energetically demanding, akin to a 23-minute jog for humans. This process involves specialized skin cells called chromatophores, which require significant oxygen consumption. The high metabolic cost may explain certain octopus behaviors, such as hiding in dens to conserve energy. The research highlights the exceptional energetic demands of cephalopod color change, suggesting it is one of the most costly forms of color change in the animal kingdom.
New research reveals that octopuses expend significant energy when changing color, comparable to a human's calorie burn during a 30-minute jog. This study, using ruby octopuses, measured oxygen consumption during color changes, highlighting the energetic cost of their sophisticated camouflage system. The findings provide insights into the biological trade-offs octopuses make for survival, as their color-changing ability is more energy-intensive than similar adaptations in other animals like chameleons.
A team of documentary makers captured the world-first footage of a Labord's chameleon's vibrant color display in the last few hours of her life in Madagascar's Kirindy Forest. The chameleon's colorful spectacle, controlled by the nervous system even in death, was recorded for the PBS series Big Little Journeys, revealing the unique behavior of this species with a lifespan of just four to five months. The chameleon's short life cycle, spending most of its time as an egg, is believed to be an adaptation to cope with Madagascar's harsh seasonal variations.
Dominant male celebes medaka fish in Indonesia turn black during periods of heightened aggression, using their distinctive black markings as a signal of dominance to other fish. The black markings quickly emerge at the start of a conflict and are more likely to attack and less likely to be attacked. The color change phenomenon is likely facilitated by neurotransmitters on cells containing pigment granules, and similar changes are seen in other fish species. This signaling may be more about access to territory and resources than mating rights, and the speed of color change is controlled by factors such as neural stimulation and hormonal control.
Contrary to online claims, burying aluminum foil near hydrangeas does not change their color. The color change is actually achieved by adding aluminum sulfate to the soil, which decreases the pH level and turns the flowers blue. However, not all hydrangea varieties can change color. To turn pink hydrangeas blue, mix 1 tablespoon of aluminum sulfate with 1 gallon of water and soak the base of the plant once a month for three months. It can take months or even up to a year for the color change to occur. To change them back to pink, use hydrated lime instead of aluminum sulfate.