What is the answer to "When the first mammals and dinosaurs appeared"?

The most common answer is TRIASSICPERIOD. However, there is 1 possible answer to this clue.

How many letters does the answer have?

The answer TRIASSICPERIOD has 14 letters.

When was this clue last used?

This clue was most recently seen in 2025.

How difficult is this clue?

We rate this clue as Easy difficulty.

When the first mammals and dinosaurs appeared Crossword Clue Answer

Stuck on When the first mammals and dinosaurs appeared? The answer is 14 letters and was featured in the November 23, 2025 NYT crossword. Get the solution here.

When the first mammals and dinosaurs appeared Crossword Answer

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Hints

Hint 1 clue words

Hint 2 anagram

Other NYT Clues (11/23/25)

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18A: "Couldn't agree more!"

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22A: Things from a distant land

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When the first mammals and dinosaurs appeared Crossword Clue FAQ

What is the 14-letter answer to "When the first mammals and dinosaurs appeared" crossword clue?

The answer to the "When the first mammals and dinosaurs appeared" crossword clue is TRIASSICPERIOD. This answer contains 14 letters and was confirmed in the NYT puzzle.

Which crossword used "When the first mammals and dinosaurs appeared" clue?

This crossword clue most recently appeared in the NYT puzzle on November 23, 2025. Daily crossword puzzles often reuse popular clues, so this clue may appear again in future puzzles from the same publication or others.