Q: A recent article stated that New York, Chicago and Philadelphia are the only three of the 10 largest U.S. cities that were also in the top 10 from 100 years ago. What were the other top 10 largest cities then?

—Dan Meehan, Peachtree Corners

A: New York (4.7 million residents), Chicago (2.1 million) and Philadelphia (1.5 million) were the three largest cities in the United States in 1910, according to the U.S. Census Bureau.

The rest of the top 10:

4. St. Louis (687,029)

5. Boston (670,585)

6. Cleveland (560,663)

7. Baltimore (558,485)

8. Pittsburgh (533,905)

9. Detroit (465,766)

10. Buffalo (423,715)

Los Angeles replaced Buffalo on the 1920 list.

The cities on the list released last week (based on 2015 population):

1. New York (8.6 million)

2. Los Angeles (4 million)

3. Chicago (2.7 million)

4. Houston (2.3 million)

5. Philadelphia (1.6 million)

6. Phoenix (1.6 million)

7. San Antonio (1.5 million)

8. San Diego (1.4 million)

9. Dallas (1.3 million)

10. San Jose, Calif. (1 million)

Q: Why did the two horses die before the Preakness Stakes on Saturday?

—Mike Cooper, Atlanta

A: Homeboykris, a 9-year-old gelding, apparently had a heart attack after winning an undercard race for the Preakness Stakes at Pimlico Race Course.

He collapsed while walking from the winner’s circle to the barn.

A autopsy was expected to be scheduled for Homeboykris, who finished 16th in the 2010 Kentucky Derby.

Pramedya, a 4-year-old filly, broke her front left leg in Race 4 and was euthanized on the track.

Andy Johnston with Fast Copy News Service wrote this column. Do you have a question? We’ll try to get the answer. Call 404-222-2002 or email q&a@ajc.com (include name, phone and city).