Researchers compared the skulls of domesticated house cats to the skulls of their closest wild ancestor, and found that cat brains are definitely shrinking.
Several of these factors can be screened for in a patient's blood.
The zeroth law of thermodynamics states that if two bodies are each in thermal equilibrium with some third body, then they are also in equilibrium with each other.
Is COVID-19's rapid evolution unusual, or do other viruses have as many variants as this coronavirus?