Earth's Surface

An illustration of the ERS-2 satellite.

SMART NEWS

A 5,000-Pound Satellite Is Falling Back to Earth This Week—and Will Likely Land in the Ocean

Alessandro Rotta Loria and a student in his lab walk through a train tunnel beneath the Chicago Loop.

SMART NEWS

Chicago May Be Slowly Sinking Because of 'Underground Climate Change'

An illustration of the Snowball Earth with some open water around the equator and a newly proposed patch of ocean at mid-latitudes

SMART NEWS

How Life Could Have Survived the Frozen ‘Snowball Earth’

A present-day orange demosponge (Agelas oroides) can be found off the coast of Corfu, Greece. Research suggests sponges may have lived on Earth 890 million years ago.

SCIENCE

This Sponge Fossil May Be the Earliest Record of Animal Life

Earth's Crust

The earthquake on March 27, 1964, dropped Anchorage’s Fourth Avenue and some cars on it roughly 20 feet below normal.

SCIENCE

How the Great Alaska Earthquake Shook Up Science

Melting ice redistributes mass to Earth's equator, slowing its spin rate. Changes in Earth's spin affect its synchronization with atomic clocks.

SMART NEWS

Melting Polar Ice Sheets Are Slowing Earth's Rotation. That Could Change How We Keep Time

Costa Rica's Arenal volcano spews geysers of lava, ash and toxic gases

SCIENCE

Why Central American Volcanoes Are Ideal for Studying Earth's Evolution

A high-temperature hydrothermal vent field discovered on Puy des Folles Seamount on the Mid-Atlantic Ridge at approximately 6,562 feet in depth.

SMART NEWS

See the Breathtaking Ocean Life Found at Deep-Sea Vents

Featured story

Nematodes (blue) wiggle inside a stalactite from a South African gold mine in this image taken with a microscope.

SCIENCE

Inner Earth Is Teeming With Exotic Forms of Life

More than a mile below the surface, our planet supports diverse creatures that could give us clues about life across the solar system

Earth's Mantle

An illustration of some of the underwater creatures that lived during the Ediacaran Period, roughly 635 million to 541 million years ago.

SMART NEWS

Earth's Magnetic Field Nearly Collapsed 600 Million Years Ago. Then, Weird and Complex Life Evolved

The earthquake on March 27, 1964, dropped Anchorage’s Fourth Avenue and some cars on it roughly 20 feet below normal.

SCIENCE

How the Great Alaska Earthquake Shook Up Science

Costa Rica's Arenal volcano spews geysers of lava, ash and toxic gases

SCIENCE

Why Central American Volcanoes Are Ideal for Studying Earth's Evolution

An artist's rendition of the collision between Earth and the protoplanet Theia, which, according to the prevailing theory, resulted in the moon's formation.

SMART NEWS

Mysterious Lumps in Earth's Mantle May Be Remains of the Crash That Formed the Moon

Earth's Core

An illustration of some of the underwater creatures that lived during the Ediacaran Period, roughly 635 million to 541 million years ago.

SMART NEWS

Earth's Magnetic Field Nearly Collapsed 600 Million Years Ago. Then, Weird and Complex Life Evolved

Melting ice redistributes mass to Earth's equator, slowing its spin rate. Changes in Earth's spin affect its synchronization with atomic clocks.

SMART NEWS

Melting Polar Ice Sheets Are Slowing Earth's Rotation. That Could Change How We Keep Time

Previous analyses of seismic activity on Mars suggested its core was surprisingly large, with a low density. Two new studies suggest the opposite.

SMART NEWS

Mars' Core May Be Smaller Than Thought, Wrapped in a Sea of Molten Rock

An artist's rendition of the Pysche asteroid. Data suggests that Psyche is between 30 and 60 percent metal, unlike any object in the solar system scientist's have observed up close before.

SMART NEWS

NASA Launches Mission to Study Distant Asteroid