Teghaza 001

Why in News?

• A NASA-funded study published in October 2026 in the journal Science revealed that Teghaza 001, a Martian meteorite discovered in Mali’s Sahara Desert, is more than 4.1 billion years old.
• It is considered one of the oldest known pieces of Mars found on Earth.

About Teghaza 001

• Nature: Rose-coloured Martian meteorite.
• Discovery: Found in 2022 in the Sahara Desert, Mali, near the Teghaza salt plain.
• Name: Named after the Teghaza salt plain in Mali.
• Weight: Approximately 800 grams.
• Age: More than 4.1 billion years.
• Significance: One of the three most ancient Martian meteorite samples discovered on Earth.
• Origin: Formed from cooling magma in the ancient Martian crust.

Major Scientific Findings

• Evidence of Ancient Water: Chemical markers indicate that the rock interacted with liquid water during its formation and evolution.
• Subsurface Water: Water interacted with rocks beneath the Martian surface around 4.1 billion years ago.
• Ancient Environment: Provides evidence that early Mars was warmer and wetter than it is today.
• Potential Habitability: Suggests that ancient Mars may have had environmental conditions suitable for life, but does not prove that life existed.
• Zircon Crystals: Zircon minerals helped scientists determine the meteorite’s age through radiometric dating.
• Scientific Importance: Provides a rare insight into the formation and evolution of the ancient Martian crust.

Other Ancient Martian Meteorites

• ALH84001: One of the oldest known Martian meteorites found on Earth.
• Black Beauty: Another Martian meteorite, formed approximately 2.1 billion years ago.
• Teghaza 001: Along with ALH84001 and Black Beauty, it is among the three most ancient Martian meteorite samples identified on Earth.

Basic Concepts: Meteoroid, Meteor and Meteorite

• Meteoroid: A piece of solid material of different sizes orbiting the Sun.
• Meteor: When a meteoroid enters Earth’s atmosphere at high speed and burns up, it produces a bright streak of light called a meteor.
• Meteorite: When a meteoroid survives its journey through the atmosphere and reaches the ground, it is called a meteorite.

Prelims Practice Questions

Q1. With reference to Teghaza 001, consider the following statements:

1. It is a Martian meteorite discovered in Mali’s Sahara Desert.
2. It is more than 4.1 billion years old.
3. It provides evidence of interaction with liquid water on ancient Mars.

Which of the statements given above is/are correct?

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Answer: (d) 1, 2 and 3