Ballpark — October 23, 2026
Answers to that day's 5 daily estimation questions.
How deep is Lake Baikal, the deepest lake in the world?
5,387 feet
It also holds roughly a fifth of all the unfrozen fresh water on Earth's surface.
How tall is Angel Falls in Venezuela, the world's tallest waterfall?
3,212 feet
Its single uninterrupted drop alone is 2,648 feet — the longest of any waterfall on Earth.
How many miles long is the mid-ocean ridge — the longest mountain range on Earth, mostly hidden underwater?
40,389 miles
More than 90% of this volcanic mountain chain lies hidden beneath the ocean.
Annual salary of a rank-and-file member of Congress
174,000 USD
Leadership positions receive higher salaries.
Median U.S. household income in 2024
~83,725 USD
Half of households had more money income and half had less.