What is the number of deaths by capital punishment per year in the US, and how has the death penalty changed in the US over time?

How many non-transgender individuals have access to healthcare compared to the accessibility of healthcare to those who are transgender? 

How does social standing, political choice, and income effect adoption rights for gay couples? 

How do ultrasounds help doulas assist pregnant people?

How does the way an instrument is made affect the sound it produces and how does that affect the musicians playing? 

What is the significance of understanding space sounds? 

How can sound wave vibrations benefit deaf people in the performing arts? 

When performing radiation therapy to kill cancer cells, what happens to the other cells and how can we secure them from damage?

How does understanding the purpose of whale communication sounds help to manage and conserve the whale population?