Level 1 — Absolute Beginner
Venus is a planet. It is near Earth in space. For a long time, people thought Venus was completely dead inside. This means nothing moves or changes deep under its surface.
Now, new computer studies show something different. A scientist named Taras Gerya, from a school called ETH Zurich in Switzerland, led a team of scientists. They made detailed 3D computer simulations of big cracks on Venus. These cracks are called rift valleys.
The study shows that some rift valleys are younger than scientists thought. They might still be growing today. New rift valleys have tall, wide edges. Old rift valleys are flatter and lower.
This is an important discovery. It means the inside of Venus might still be active, not dead like people used to believe.
- planet
- a large round object in space that moves around a star
- surface
- the outside or top layer of something
- scientist
- a person who studies and learns about the world
- simulation
- a computer model that copies how something works in real life
- crack
- a long thin break or line on something
- valley
- a long low area between higher land
- active
- still moving, changing, or working
- atmosphere
- the layer of gas around a planet
Level 2 — Elementary
Venus is the second planet from the Sun. It is almost the same size as Earth, so people sometimes call it Earth's twin. But Venus has an extremely hot and heavy atmosphere.
For a long time, scientists believed that Venus was geologically dead, meaning nothing much changes inside the planet anymore. Unlike Earth, Venus does not have moving tectonic plates.
Now, a team led by Taras Gerya, a professor of geodynamics at ETH Zurich in Switzerland, has built the first detailed 3D computer simulations of Venus's rift valleys, which are huge cracks and trenches on the planet's surface.
The simulations show that some rift valleys are much younger than experts thought, and they might still be growing wider today. This new work also explains why old rift valleys look flatter and sunken while new ones have tall, wide edges.
- tectonic plates
- huge pieces of a planet's outer layer that can move
- geodynamics
- the science that studies the forces and movement inside a planet
- rift valley
- a long, deep crack or trench in a planet's surface
- flank
- the raised edge or side of a rift valley
- subside
- to sink down or become lower over time
- dynamic
- full of energy and change
- dormant
- not active right now, resting
- twin
- something that looks very similar to another thing
Level 3 — Intermediate
Venus, often described as Earth's planetary twin because of its comparable size, has long been considered geologically inactive, a cooled and largely unchanging world beneath its thick, scorching atmosphere. Unlike Earth, Venus lacks a system of tectonic plates that shift and collide over time, which led many researchers to assume its surface has remained essentially frozen for a very long time.
That assumption is now being challenged. A team led by Taras Gerya, professor of geodynamics at ETH Zurich in Switzerland, has produced the first high-resolution, three-dimensional computer simulations of Venusian rift valleys, the vast, trench-like scars that cut across the planet's surface.
According to the simulations, some of these rift valleys are considerably younger than previously assumed and could still be actively widening. The models reveal a clear pattern, recently formed rifts have tall, broad flanks, or raised edges, while older rifts have gradually subsided and flattened over time, a distinction the simulations can now explain in unprecedented detail.
The findings, published in the journal Nature Geoscience, suggest that Venus's interior may be far more dynamic than researchers have traditionally believed, reopening questions about whether the planet is truly as geologically dormant as its dead reputation implies.
- geodynamics
- the branch of science that studies the forces and movements inside planets
- rift valley
- a long, trench-like crack in a planet's crust formed as the ground pulls apart
- flank
- the raised edge along the side of a rift valley
- subsided
- sank down or settled lower over time
- dormant
- inactive, showing no current signs of change
- dynamic
- constantly changing and full of internal activity
- high-resolution
- having a very high level of detail and clarity
- trench
- a long, narrow, deep cut in the surface of land
Level 4 — Advanced
For decades, Venus, the second planet from the Sun and often billed as Earth's twin on account of its near-identical size, has occupied an awkward position in planetary science, too similar to Earth to ignore, yet seemingly too geologically inert to explain. Absent the mobile tectonic plates that continuously reshape Earth's crust, Venus's surface was widely presumed to have settled into a largely static state beneath its punishing, superheated atmosphere.
A new study complicates that picture considerably. Led by Taras Gerya, professor of geodynamics at ETH Zurich in Switzerland, a team of researchers has constructed the first high-resolution, three-dimensional computer simulations of Venusian rift valleys, the immense, trench-like fractures that scar the planet's surface, in an effort to determine how, and when, these features formed.
The results indicate that certain rift valleys are considerably younger than previously assumed, and may still be actively widening in the present day. Crucially, the simulations offer, for the first time, a detailed mechanistic explanation for a pattern long observed but poorly understood, newly formed rifts display tall, broad flanks, or raised edges, while older rifts have gradually subsided and flattened, losing elevation as they age.
Published in the journal Nature Geoscience, the findings suggest that Venus's interior is considerably more dynamic than the geologically dead characterization long applied to it, and they invite renewed scrutiny of how such an Earth-sized world could lack plate tectonics yet still exhibit ongoing structural deformation at its surface.
- geodynamics
- the scientific study of the forces and movements that shape a planet's interior and surface
- fracture
- a break or crack in a solid surface
- mechanistic
- explaining how something works through cause and effect, step by step
- deformation
- a change in the shape or structure of something
- subside
- to sink or settle to a lower level over time
- elevation
- height above a surrounding surface
- dormant
- inactive, not currently showing change or growth
- punishing
- extremely harsh or severe
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