Prelims Booster

5th May – Prelims Booster

Arignar Anna Zoological Park

With lessons, activities and learning all going online during the lockdown, Arignar Anna Zoological Park in Vandalur will be hosting a virtual zoo ambassadors camp this year.

About Arignar Anna Zoological Park –

  • Arignar Anna Zoological Park (also known as Vandalur Zoo) is one of the modern and scientifically managed zoos of the Country.
  • It has attained excellence in the Conservatory Breeding Programme for endangered species and also in the field of zoo education by creating awareness about the conservation of natural resources.
  • The functions carried out in the zoo include animal welfare, commissary (store), transport, research, education and awareness, veterinary, horticulture, security and sanitation and zoo administration.
  • The area of the zoological park is 602 hectares and it is located in Vandalur (Kanchipuram District), Tamil Nadu.
  • Established in the year 1855, it is the first public zoo in India. It is affiliated with the Central Zoo Authority of India.


Amid the COVID-19 lockdown, two community specific groups have renewed their opposition to the permanent settlement of Bru refugees from Mizoram in Tripura.

Who are ‘Brus’?

  • Reang or Bru  are one of the 21 scheduled tribes of the Indian state of Tripura.
  • The Bru are the second most populous tribe of Tripura after the Tripuris.
  • The correct nomenclature for this ethnic group is actually Bru although the name Reang was accidentally incorporated by the Indian government during a census count.
  • The Bru can be found all over the Tripura state in India.
  • However, they may also be found in Mizoram, Assam, Manipur and Bangladesh.

Culture and religion –

  • The marriage system is similar to other Tripuri tribes of Tripura.
  • There is no dowry system.
  • Dance is an integral part of Reang life.
  • The Hojagiri folk dance of Riang sub tribe is rather well known all over the world.
  • ‘Buisu’ is the most popular festival of reang tribes.
  • The majority of the Reang belong to the Vaishnav school of Hinduism and claim Kshatriya status.
  • They are polytheists and believe in multiple Gods and Goddesses.

H-1B visa

In a major relief for professionals and immigrants from countries like India, the US government has given a grace period of 60 days to H-1B visa holders and Green Card applicants, who have been served notices for submission of various documents, taking into account the massive COVID-19 outbreak in America.

What is H-1B visa?

The US H1-B visa is designed to be used for staff in specialty occupations. The job must meet one of the following criteria to qualify as a specialty occupation –

  • Have a minimum entry requirement of a Bachelor’s or higher degree or its equivalent.
  • The degree requirement for the job is common to the industry or the job is so complex or unique that it can be performed only by an individual with a degree.
  • The employer normally requires a degree or its equivalent for the position.
  • The nature of the specific duties is so specialised and complex that the knowledge required to perform the duties is usually associated with the attainment of a bachelor’s or higher degree.
  • H-1B visa holders can bring their spouse and children under 21 years of age to the US under the H-4 Visa category as dependents. An H4 Visa holder is allowed to remain in the US as long as the H-1B visa holder remains in legal status.
  • While, an H-4 visa holder is not eligible to work in the US, they may attend school, obtain a driver’s license and open a bank account while in the US.

Satyajit Rai

Ministry of Culture’s Development of Museums and Cultural Spaces (DMCS) digitally launched the short film “A Ray of Genius” to mark the beginning of the centenary celebrations of Satyajit Ry.

About Satyajit Rai –

  • Satyajit Ray was an Indian filmmaker, screenwriter, music composer, graphic artist, lyricist and author, widely regarded as one of the greatest filmmakers of all time.
  • The Government of India honoured him with the Bharat Ratna, its highest civilian award, in 1992.
  • He was awarded an honorary degree by Oxford University.
  • Ray’s first film, Pather Panchali (1955), won eleven international prizes, including the inaugural Best Human Document award at the 1956 Cannes Film Festival. Other work includes Charulata, Teen Kanya, Sonar Kella and the ‘Apu Trilogy’. With Pather Panchali (Song of the Road), Indian cinema was launched on the world stage.

Professor B Lal

On the occasion of centenary year of great archaeologist Professor B. B. Lal, Union Culture Minister has released an e-book “Prof. B. B. Lal -India Rediscovered” recently.

About Professor B Lal –

  • Prof Lal was born on 2nd may 1921 in village Baidora, District Jhansi, Uttar Pradesh.
  • Prof. B. B. Lal is a precious gem of Indian archaeology who rediscovered the civilisational India buried under the colonial past.
  • Prof. B. B. Lal was conferred upon Padma Bhushan in the year of 2000.
  • He was the Director General of the Archaeological Survey of India (ASI) from 1968 to 1972 and has served as Director of the Indian Institute of Advanced Studies, Shimla
  • Prof. Lal excavated several important landmark sites including Hastinapura (U.P.), Sisupalgarh (Orissa), Purana Qila (Delhi), Kalibangan (Rajasthan).
  • From 1975-76 onwards, Prof. Lal investigated sites like Ayodhya, Bharadvaja Ashrama, Sringaverapura, Nandigrama and Chitrakoota under the Archaeology of Ramayana Sites.


Scientists at the Indian Institute of Geomagnetism (IIG) have developed a generalised one-dimensional fluid simulation code capable of studying a wide spectrum of coherent electric field structures in near-earth plasma environment or earth’s magnetosphere which can be useful in planning of future space missions.

About magnetosphere –

  • It is the region around a planet dominated by the planet’s magnetic field.
  • Other planets in our solar system have magnetospheres, but Earth has the strongest one of all the rocky planets.
  • The magnetosphere shields our home planet from solar and cosmic particle radiation, as well as erosion of the atmosphere by the solar wind – the constant flow of charged particles streaming off the sun.

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