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Author Question: Rods in the retina: a. Provide our best visual acuity b. Are more sensitive to light than cones ... (Read 90 times) |
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.