Daily Trivia Quiz - Day 169 (2026-04-06)

Question 1

If you stand with the sun behind you on dewy grass, a glowing ring can appear around your shadow's head. What causes that bright halo?

Accepted Answer

Backscattered light from dew

Question 2

Why does corrugated cardboard become much stiffer after a wavy layer is glued between two flat sheets?

Accepted Answer

The wavy layer increases thickness and resists bending

Question 3

Old comic printers could make a page look full-color even with limited inks by covering areas in tiny colored dots. Why did that work?

Accepted Answer

Your eye blends the dots

Question 4

A lady's slipper orchid can lure a bee inside and then prevent it from leaving the way it came. Why trap the bee in the first place?

Accepted Answer

To force it past the pollen

Question 5

A person with Anton syndrome may be blind yet confidently describe the room around them. What are they unaware of?

Accepted Answer

Their own blindness

Question 6

A check valve lets water or air move one way but not the other. What usually stops the reverse flow?

Accepted Answer

Reverse pressure pushes a movable part shut

Question 7

Some green herons do something that looks almost human when hunting. What do they sometimes drop onto the water before striking?

Accepted Answer

Bait

Question 8

A Dracula orchid can smell uncannily like mushrooms. Why would a flower mimic that scent?

Accepted Answer

To attract fungus-seeking flies

Question 9

Why can a sealed potato chip bag puff up dramatically after you drive high into the mountains?

Accepted Answer

Outside air pressure drops

Question 10

Oak trees can stay relatively quiet for years and then suddenly carpet the ground with acorns. What is the advantage of that boom year strategy?

Accepted Answer

It overwhelms seed predators