John Snow
• British ( 1813~ 1858)
• a legendary(传奇的) figure in the history of public health, epidemiology
['epi,di:mi'ɔlədʒi] (流行 病学) and anesthesiology(麻醉 学)
4. Who used peas to show how physical characteristics are passed from parents to their children.
A. Thomas Edison B. Gregor Mendel C. Archimedes
格里哥·孟德尔(奥地利遗传学家
Do you know other scientists?
•The following is a quiz and let’s find out who knows the most.
Let’s have a competition!
1.Which scientist discovered that objects in water are lifted up by a force that helps them float?
He has worked in astronomy and studied black holes in space. He has shown that black holes do not only absorb everything around them but, from time to time, throw out matter as well. This may mark the beginning of new galaxies(银河系). This is an advance on the old theory which said that black holes “eat” everything they come across.