Ballpark — April 2, 2026
Answers to that day's 5 daily estimation questions.
Length of the world's longest tunnel (Gotthard Base Tunnel)
35 miles
Took 17 years to build.
Days it takes the Moon to orbit Earth
~27 days
The sidereal month is about 27.3 days.
About what percentage of Cheerios (by weight) is sugar?
~4%
Original Cheerios are relatively low-sugar compared with many cereals.
How many times does a hummingbird flap its wings per minute?
~3,600 flaps
Many hummingbirds beat their wings dozens of times per second.
About how much caffeine is in a single shot of espresso?
~65 mg
Espresso is concentrated, but the serving size is small.