Home › Science Expeditions › After the Sky Fell

A SCIENCE EXPEDITION / 3 CHAPTERS / 8 STOPS

After the Sky Fell

How can an impact destroy ecosystems and leave a different kind of habitat behind?

Follow the catastrophe into the fossil and mineral records, then carry the question to Mars. Keep the survival of organisms, the recovery of ecosystems and the origin of life separate as you go.

90–150 minutes, across several visits. No deadline; each chapter is a natural place to pause.

An imagined asteroid impact on an ocean-bearing world, seen from space
AI-generated conceptual artwork, not a photograph of Chicxulub or an observed exoplanet impact.

Your next step

0 of 8 stops completed

Use “Mark this stop complete & continue” when you are ready to move on. Visiting a page alone never marks it complete.

Chapter 1 · Follow the catastrophe
  1. 01

    Documentary

    Watch the world change

    Ready to explore

    Watch the film, then use its viewing guide to separate the immediate impact, the food-web crisis and later recovery. Which proposed survival advantages depend on the setting?

  2. 02

    3D Atlas

    Put the event on a planetary stage

    Ready to explore

    Use the illustrated Earth and Moon view to place impacts within planetary history. This is a context model, not a reconstruction of the Chicxulub collision.

Chapter 2 · Read what the rocks kept
  1. 03

    Investigation

    Follow the chain after the impact

    Ready to explore

    Trace the sequence from lost sunlight to survivors, recovery and cooling crater environments. Identify where an observation gives way to a model or a wider inference.

  2. 04

    Evidence File

    Separate a habitat from its inhabitants

    Ready to explore

    Compare hydrothermal duration, sulfur isotope interpretation and Martian mineral alteration. Which measurement supports each claim, and what would go beyond it?

  3. 05

    Evidence File

    Compare a different crater record

    Ready to explore

    Follow Hapcheon’s impact evidence, later lake layers and geochemical interpretation. Keep this younger lake setting distinct from Chicxulub’s cooling hydrothermal system.

Chapter 3 · Carry the question to another world
  1. 06

    3D Atlas

    Look at Mars in planetary context

    Ready to explore

    Explore the illustrated planet and its geological variety. This Atlas does not recreate Ritchey crater’s measured mineral map or show evidence of Martian organisms.

  2. 07

    Investigation

    Ask the harder origin question

    Ready to explore

    Examine possible early-Earth chemical refuges. Why would a model of favorable conditions, or later life in a crater, fall short of locating the origin of life?

  3. 08

    Image story

    Write a careful caption for the last world

    Ready to explore

    Inspect the imagined exoplanet. Use the earlier records to write one supported claim, one inference and one open question. What must the artwork’s caption avoid implying?

Manage saved progress

Clear this expedition’s progress in this browser. Your science mystery casebook stays separate.

All stops are available now. Calendar reminders help you return; they do not unlock new content. Progress is saved in this browser when storage is available.