Researchers have measured the immense airflows generated by breathing dolphins, finding they can inhale up to 33.4 l/s but exhale up to 137.6 l/s, surpassing terrestrial champion horses. The study reveals the dolphins' lungs are compressible and highly efficient.
Researchers found that hibernating black bears suppress resorption of bone tissue to maintain their skeleton, protecting bones by reducing resorption. This discovery provides insights into how these animals conserve energy and bone mass during long periods of inactivity.
Researchers found that pregnant pipefish males supply relatively low oxygen levels to their embryos, averaging 51% in well-oxygenated water and as low as 32% in poorly oxygenated conditions. Despite this, the fathers' care allows the young to survive and thrive, with a focus on nutrient supplementation and waste removal.
Researchers at the Molecular Medicine Institute and University College London Ear Institute have created a protocol to produce inner ear hair cells, crucial for hearing and balance. The study's success suggests that similar strategies might work in humans, paving the way for cell transplantation therapies or high-throughput drug screens.
Researchers have discovered a novel antibody insecticide that targets the African malaria mosquito, offering an alternative control strategy to halt the spread of the disease. The antibodies work by targeting a key component of the mosquito's nervous system, killing over 90% of infected insects within a day.
Researchers discovered fire ants can excavate tunnels regardless of grain size, with moisture affecting only dry soils. The ants use mechanical factors and capillary forces to build stable structures.
Researchers found that inhibiting molecular pathways involved in damage caused by stress response can improve egg viability. This approach may help obese women conceive using therapeutic approaches.
Researchers study goshawk attack tactics, finding birds hold victims in gaze for initial stage before switching to parallel pursuit. Prey evade capture by making sharp sideways turns, exploiting predator's visual guidance.
Researchers discovered that homing pigeons use an internal gyroscope to guide themselves home, even when encountering disturbances in the gravity field. The study found that birds initially set a bearing home by comparing their home gyroscope setting with their local gyroscope reading.
A 1985 mass mortality and a 2012 severe cold snap led to the deaths of nearly one-third of Camargue flamingo population. The study suggests that freezing temperatures increased the birds' energy demands, tipping them into starvation. The researchers found that the 2012 event had a lower death toll due to milder temperatures.
Scientists at The University of Texas Health Science Center have developed a new method to generate mouse cells that can form bone and cartilage using small molecules. This approach offers great potential in the repair of bone defects through cartilage, with the ability to be scaled up for clinical purposes.
Researchers studied astronauts' movements in low gravity and found that they could maintain higher speeds while walking on the moon. The team used NASA's DC-9 aircraft to simulate lunar gravity and tested the speed at which walkers transitioned from a walk to a run, discovering an average speed of 1.4m/s, exceeding previous estimates.
Marine species use reflectors on scales to reduce contrast with background, but tiny mantis shrimp larvae hide compound eyes behind brilliant eye reflections that match surrounding water spectrum. Lab tests show little contrast between eye reflections and environment, revealing potential role for larval eyeshine in camouflage
Researchers have made the first live observations of minke whales feeding under sea ice, revealing a unique behavior that involves lunging up to 100 times per hour. The team used non-lethal tagging methods to study the whales' diet and habitat, providing new insights into the Antarctic ecosystem.
Researchers found that dolphins and beluga whales exhibit a delay between reward anticipation and squealing, suggesting they experience pleasure. This behavior is comparable to the timing of dopamine release in humans.
Fire ants form complex networks of connections between their bodies and limbs, aligning their bodies perpendicularly and pushing against each other to reduce density. The ants actively control spacing and orientation within self-assemblages, using their legs to grip neighbours and increase buoyancy.
Tropical ants have developed swimming abilities to navigate flooded forests, with over 50% of species exhibiting this trait. The ants' swimming techniques, such as using one leg to propel themselves forward and the other for stability, were analyzed in a study published in The Journal of Experimental Biology.
A recent study found that sea otter females must provide 930 MJ of energy to raise a pup to independence, equivalent to 96% increase in daily metabolic rate. This extreme exertion may contribute to poor condition and high mortality rates among sea otter mothers.
Researchers discovered that female parasitic fig wasps possess zinc-tipped ovipositor drill bits, allowing them to efficiently navigate and lay eggs within the fruit's woody interior. The drill bit's hardness and wear resistance were found to be remarkable, comparable to dental implants.
Harvard scientists produce the first realistic simulated shark skin, which reduces drag and increases swimming speed by 6.6% while decreasing energy expenditure by 5.9%. The artificial skin's performance is comparable to that of real shark skin, with improved drag reduction at slower flow speeds.
Researchers discovered that elephant seals have high levels of carboxyhemoglobin, similar to those found in heavy human smokers. The team suggests that this may provide protective effects against oxidative damage, potentially benefiting the animals' health. Further study is needed to fully understand the significance of these findings.
Goldenrod gall fly larvae produce a novel class of lipids that remain fluid at low temperatures, allowing them to survive freezing winters. These acetylated triacylglycerols are less energy dense than standard lipids and have antifreeze characteristics.
Male stag beetles have enlarged heads and muscles to compensate for their oversized mandibles, allowing them to generate powerful bites. Their male bites are six times stronger than females', with a recorded strength of 7N.
Researchers used a 3D printer to recreate the snake's UFO-like cross-section and found that it generates sufficient lift at most angles. However, they also discovered a massive spike in lift when tilting the model at 35 degrees and an unexpected vortex sucking the rod down.
Researchers measured dolphin force using bubble DPIV, proving Gray's paradox was incorrect. Dolphins produce impressive power, even accelerating rapidly at 5400 W.
Researchers from Haverford College discovered that falcons head off their prey by flying so the target appears stationary in the falcon's visual field, reducing energy expenditure and increasing hunting success. This strategy is also employed by bats and humans when chasing prey or evading threats.
This collection of reviews covers the impact of environmental changes on organisms, including molecular mechanisms and epigenetic factors. Key findings highlight the complexity of stress responses across generations, emphasizing the need for integrated cell stress responses for survival.
Researchers studied cockroach behavior to develop faster robots, finding that mechanical changes can overcome nervous system limitations. Cockroach antennae bend in response to rough surfaces, allowing for stable navigation during high-speed maneuvers.
A team of scientists found that male katydids can synchronize their chirps in the presence of a masking trill, with the ability to detect low-frequency components. The researchers used tiny hook electrodes to study the neural activity of katydids and discovered that an auditory neuron was involved in detecting these frequency components.
Researchers have made a significant discovery in adult heart repair by identifying the Hippo pathway as a key regulator of cardiomyocyte proliferation. This breakthrough has the potential to improve heart function after a heart attack and reduce the severity of heart disease.
Researchers found that snakes reduce blood flow in their eyes by prolonging periods of contraction, allowing for better vision. This adaptation is thought to be advantageous in threatening situations.
Researchers studied elephant vocal folds to understand how they produce infrasonic calls. They found that elephant vocal folds are orientated at a very acute angle in relation to the air stream, whereas in humans they are almost perpendicular.
Researchers from Brown University recruited frogs from the fair and compared their jumps to those in the lab. Most professional and rental frogs outperformed lab frogs, revealing a non-linear relationship between sample size and jump distance.
Researchers have discovered that female Doryteuthis opalescens squid display male-like iridescent stripes that may help them evade male aggression. These unique markings are achieved through the activation of switchable leucophores and tunable iridocytes, which can produce a range of colors in response to neurotransmitters.
Scientists have successfully transmitted HIV in a mouse model of heterosexual intercourse, shedding light on the complexities of viral transmission and potential prevention methods. The study's findings suggest that hormonal factors in the female reproductive tract can impact host susceptibility to HIV infection.
Researchers used eye-tracking to investigate what attracts female peahens to male peacocks. The study found that peahens spend most of their time gazing at the lower portion of the train, rather than its showy upper feathers. This suggests that the lower train may be the primary attraction for females.
Researchers found that elephants increase their skin's permeability during hot summer months and rely on evaporation of sweat to cool down. The study suggests that climate plays a significant role in an elephant's water dependence, with different species requiring varying amounts of water for cooling.
Researchers discovered a thermogenic secondary sexual character in male sea lampreys, producing heat through a rare type of fat. The 'rope tissue' plays a crucial role in courtship and mating, making it an essential component of the species' reproductive behavior.
Research on weakly electric fish reveals the complexity of their electrocommunication methods, including multiple neural coding systems and diverse behavioral responses. The study sheds light on the evolution of these unique sensory systems in different species.
A study by Patricia de Cocq and colleagues found that 'rising trot' reduces the force exerted on a horse's back, decreasing the risk of injury. By analyzing data from experienced dressage riders using both techniques, they showed that rising trot significantly reduced the load on horses' backs.
Researchers found that the sticky nature of opaline, not its chemical composition, is responsible for reducing sensory responses in lobsters. The study suggests that sea hares can escape predation by using opaline to inactivate a lobster's sense of smell and ability to feed.
Researchers found that whale baleen traps food particles at natural swimming speeds by tangling in flowing water. The flexible material, composed of keratin, forms plates with internal fibrous cores and bristly fringes that trap particles as whales skim or lunge through the ocean.
Researchers found that clownfish fan their anemone hosts to increase oxygen consumption, benefiting both species. The fish's nocturnal antics may also improve circulation in the anemone, supporting life under low oxygen conditions.
Researchers discovered that homing pigeons rely on 'loft-specific infrasonic map cues' to navigate, which are disrupted when release sites are shielded from these low-frequency signals. This finding resolves a long-standing puzzle and sheds new light on the birds' impressive navigation abilities.
The human hand's unique shape may have evolved to stabilize the fist and produce a compact club for use in combat, according to a new study. The researchers found that the tightly packed human fist provides internal support to the digits, protecting them from damage during combat.
A group of parasites hijack their victims' nervous systems, reducing them to helpless zombies. These manipulators can have a significant impact on ecology, physiology, and evolution, orchestrating the behaviour of vertebrates and invertebrates.
Researchers discovered that some mantis shrimp species use muscle to propel their spears, unlike their larger cousins which rely on ballistics. The study found that smaller mantis shrimps use a spring-loaded catapult mechanism.
A study by Menzel and colleagues found that sleep-deprived bees struggled to form new memories, particularly in navigating alternative routes. In contrast, well-rested bees easily learned new routes after being displaced from familiar paths.
Researchers found that humpback whales use a unique tactic to lunge for krill, beating their tail fins twice as fast as normal and maintaining speed while gliding after opening their mouths. This discovery suggests that lunge feeding may be cheaper than previously thought, but still highly demanding.
Researchers discovered that Chinese soft-shelled turtles urinate primarily through their mouths, allowing them to conserve water in brackish environments. This unique adaptation enables the turtles to avoid problems associated with drinking salty water and excreting excess salts.