The September 24, 2026 puzzle ran from a Velociraptor at 2 m to a Brachiosaurus at 22 m — about 11× apart, drawing on dinosaurs. The pair furthest apart was round 4: a Brachiosaurus is 1.5× as big as a Spinosaurus.
Puzzle #3 asked about a Spinosaurus, an Ankylosaurus, a Velociraptor, a Brachiosaurus and an Iguanodon. Each answer below gives the measured size, the reference it stood beside and the source behind the number. Want the surprise first? Replay this puzzle — archived days never touch your streak.
ROUND 1
How long is a Spinosaurus compared with a Tyrannosaurus rex?
Answer: Spinosaurus — 15 m. A Spinosaurus measures 15 m (length / span), which is 1.2× as big as the reference, a Tyrannosaurus rex at 12.3 m.
The longest predatory dinosaur known, and probably one that spent much of its life in water.
Common miss: players tend to compress a Spinosaurus when it sits beside a Tyrannosaurus rex — big things get squeezed, small familiar things get stretched.
How long is a Brachiosaurus compared with a Spinosaurus?
Answer: Brachiosaurus — 22 m. A Brachiosaurus measures 22 m (length / span), which is 1.5× as big as the reference, a Spinosaurus at 15 m.
Brachiosaurus held its neck upward, making it far taller than long-tailed sauropods of similar length.
Common miss: players tend to compress a Brachiosaurus when it sits beside a Spinosaurus — big things get squeezed, small familiar things get stretched.
Sizes are measured along the axis named in each round and link to their published source. Explore the full library by category, or read how scoring works.