MS-ESS1-4
Construct a scientific explanation based on evidence from rock strata for how the geologic time scale is used to organize Earth's 4.6-billion-year-old history.
- Fossils
Dino double whammy
Most scientists think an asteroid helped kill off the dinosaurs. But new calculations suggest that asteroid might have gotten some help from a long series of volcanic eruptions in what is now India.
- Earth
When life exploded
Life exploded in diversity during the Cambrian Period. Experts are exploring what could account for this sudden change 540 million years ago.
- Earth
Meteorites likely wiped out Earth’s earliest life
Enormous meteorites appear to have slammed into Earth several times early in its history. Each mega-smashup would have boiled off oceans and obliterated any bit of life.
- Planets
Heavenly research
Groundbreaking research in astronomy landed four high school seniors spots as finalists in the 2014 Intel Science Talent Search.
- Earth
How Earth’s surface morphs
Partly melted rock acts like grease to help huge masses of the planet’s surface slip up, around and down.
- Space
The dark side of the universe
Most of the cosmos is invisible, but that doesn’t stop scientists from searching for it.
- Earth
Deep drilling at sea
Drilling holes deep into the seafloor unveils the ocean's past and hints at Earth's future.
- Fossils
Did dinosaurs do handstands?
Enormous dinosaurs might have balanced on their front feet when wading in shallow water.
- Space
A galaxy far, far, far away
Astronomers have glimpsed some of the most distant galaxies yet found.
