Little stories, big discoveries
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Discover English books selected for children. Find a story to read together or explore independently, with filters to help you choose.
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The Mighty Tethys Sea
A hundred million years ago, the Earth looked very different. Where there are mountains now, there used to be seas. Even the continents had different shapes altogether! But how did it all change into the Earth of today?
PDF · Fixed page layoutIllustrations: not assessed
Categories: Adventure Children & Young Adult Reading Crime, Thrillers & Mystery Engineering & Technology History Human Interest Non-fiction Science & Nature
Collection: Editor’s Picks
Readers: Kids
Suggested age: Not assessed
Suggested age, readers, English difficulty and US school grade are separate labels. Age groups are guidance based on source information or editorial review; unreviewed books are “Not assessed”. A US grade is assigned only with source information or a documented assessment; otherwise it is “Not assessed”. Levels use A1–C2 to indicate reading difficulty. StoryWeaver levels 1/2/3/4 use our approximate A1/A2/B1/B2 guide, labelled “estimated”; this is not an official equivalence. A book-specific assessment takes priority. Other unassessed books are labelled “Not assessed”. Source StoryWeaver levels are retained separately. Classics retain their original English.