Laws requiring bicyclists to wear helmets are estimated to reduce death rates due to bicycle accidents by as much as .

When zhang qin went to explore west, he brought back stories of

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

Segregation or discriminatory practices that occur even when there is no explicit legal enforcement