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 […]
A new study illustrates the concept of a domestication triangle, in which human genetics interact with sorghum genetics and the environment to influence the traits farmers select in their crops. The concept gives a more complete systemic picture of domestication.
Normally, bird flu viruses do not spread easily from person to person. But if this does happen, it could trigger a pandemic. Researchers have now explained what makes the leap from animals to humans less likely.
