A quote often attributed to Mark Twain states, "What gets us into trouble is not what we don't know. It's what we know for sure that just ain't so." How does this relate to Pangaea and the Theory of Plate Tectonics? Ted talk

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

you can't see the options

i would say it is