Check out these illusions:
Sci Am Illusions
The checker box effect (the first illusion) is very hard to disprove to someone.
Hotels: Occupancy Rate Increased 2.8% Year-over-year
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From STR: U.S. hotel results for week ending 13 April
Helped by the total solar eclipse, U.S. hotel performance increased from
the previous week, according...
10 hours ago