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4 articles from ScienceDaily

Following the lizard lung labyrinth

Birds and mammals are on extreme ends of the airflow spectrum. Mammals inhale oxygen-rich air and they exhale depleted air, exhibiting a so-called tidal flow pattern. In contrast, bird breath travels tidally through part of the respiratory system, but in a one-way loop throughout most of the lung. Biologists have discovered that Savannah monitor lizards have lung structures that are hybrid system...

Conscious visual perception occurs outside the visual system

A new study finds that the conscious perception of visual location occurs in the frontal lobes of the brain, rather than in the visual system in the back of the brain. The results are significant given the ongoing debate among neuroscientists on what consciousness is and where it happens in the brain.

Mitochondria are the 'canary in the coal mine' for cellular stress

Mitochondria, tiny structures present in most cells, are known for their energy-generating machinery. Now, researchers have discovered a new function of mitochondria: they set off molecular alarms when cells are exposed to stress or chemicals that can damage DNA, such as chemotherapy. The results could lead to new cancer treatments that prevent tumors from becoming resistant to chemotherapy.

Excessive antibiotic prescriptions for children in low-, middle-income countries

Between 2007 and 2017, children in eight low- and middle-income countries received, on average, 25 antibiotic prescriptions from birth through age 5 -- up to five times higher than the already high levels observed in high-income settings. The number of antibiotic prescriptions for young children ranged from one per year for children in Senegal to 12 per year for children in Uganda.