Bad housing, high crime and poor schools are more important than transportation or income when it comes to accessing healthy food in neighborhoods historically subjected to “redlining” — the now-illegal practice once used to refuse loans, insurance or mortgages to people in certain neighborhoods that were disproportionately inhabited by racial and ethnicity minorities.

That’s the main finding of a study by Sebastian Linde, a health policy expert with the Texas A&M University School of Public Health at Texas A&M Health, and colleagues with the State University of New York at Buffalo on why some neighborhoods have better food options than others.

Scientists have revealed the DNA identity of the “initiator,” a crucial sequence that kickstarts gene activation. AI analysis of a half million data points deciphered the initiator’s identity. Researchers can use the new information to scan for mutations that may lead to diseases such as cancer.