Explanation

In 2025, China tested a wireless rail convoy system on the Baoshen Railway, linking seven freight trains with a combined capacity of 35,000 tonnes.

This technology, developed by China Shenhua Energy, could boost railway freight capacity by over 50% without new rail lines.

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Explanation

NASA has lost contact with the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft.

MAVEN is a Mars orbiter that studied how the planet’s atmosphere escapes into space for over ten years.

It is the first mission dedicated to studying the upper atmosphere of Mars.

Additional Information:

NASA stands for National Aeronautics and Space Administration.

NASA is the space agency of the USA.

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Explanation

NASA has lost contact with the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft.

MAVEN is a Mars orbiter that studied how the planet’s atmosphere escapes into space for over ten years.

It is the first mission dedicated to studying the upper atmosphere of Mars.

Additional Information:

NASA stands for National Aeronautics and Space Administration.

NASA is the space agency of the USA.

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Explanation

Michaela Benthaus is an astronaut and mechatronics, aerospace engineer.

She belongs to Germany. 

On 20 December 2025, she became the first wheelchair user to travel to space.

She works for the European Space Agency.

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Explanation

Michaela Benthaus is an astronaut and mechatronics, aerospace engineer.

She belongs to Germany. 

On 20 December 2025, she became the first wheelchair user to travel to space.

She works for the European Space Agency.

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Explanation

Michaela Benthaus is an astronaut and mechatronics, aerospace engineer.

She belongs to Germany. 

In December 2025, she became the first wheelchair user to travel to space.

She works for the European Space Agency.

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Explanation

In May 2022, Frontier Supercomputer of USA beat Japan`s Fugaku to become world fastest supercomputer.

Explanation

Africa has been declared free from wild polio 

ARCC declared Africa " Free of Wild Polio" on 25 August 2020.

ARCC stands Africa Regional Commission for the Certification

Nigeria is the last African country to be declared free from wild polio

while 

According to UNICEF, Pakistan will be polio-free by the end of: 2023

Explanation

on 15 August 2021, the Taliban entered Afghanistan's capital city of Kabul, and took control of the country.

Over the past 12 months, human rights violations against women and girls have mounted steadily.

Explanation

AUKUS, is a trilateral security pact between Australia, the United Kingdom and the United States, announced on 15 September 2021 for the Indo-Pacific region.

Under the pact, the US and the UK will help Australia to acquire nuclear-powered submarines.