Science & Tech Current Affairs

Science & Technology Current Affairs 2019-2020 category comprises current affairs with all important national / international updates in science and tech and events for the year 2019-2020 for UPSC, States, Civil services, SSC and other competitive examinations of India and States.

Rare Palm from Andaman replanted in Kerala: To prevent its Extinction

A rare palm from South Andaman Island has found its second home in Jawaharlal Nehru Tropical Botanic Garden and Research Institute (JNTBGRI) Kerala. The species has been brought to the Indian mainland to prevent its extinction.

Highlights

The rare palm is called Pinanga andamanensis and is a critically endangered species. There are only 600 specimens of the species at present. It is tiny and generally grows in evergreen forests.

The JNTBGRI has ensured to conserve the germplasm of the tree. This will help to prevent the species from wiping out. It is endangered due to natural calamity.

The palm resembles areca palm and is used in preparing palm oil.

About the palm

The palm requires 5 t 6 hours of sunshine, 80% of humidity. It thrives well in areas where the temperature is between 22 degree Celsius and 24 degree Celsius.

The name of the palm is derived from the modern Malaysian state called ‘Penang’. The species was thought to be extinct till 1992.

What is Germplasm?

Germplasm is the living resources like tissue and seeds that are preserved for plant breeding. They can also be used are genetic resources.

Sun has entered into deepest period of Sunshine Recession

The sun has reached into a state of ‘solar minimum’. It has been more than 100 days since sun has shown zero sunspots. The sun is to enter into the deepest period of ‘sunshine recession’.

Highlights

The cycle of the sun lasts for 11 years. This is called Solar Cycle. Solar minimum does not mean that sun becomes dull or its activity reduces. It simply means that the sun is changing forms. The sun spots fade away every 11 years.

Solar Cycle

The Solar Cycle is also called the Solar Magnetic Activity Cycle. It exists for 11 years and is measured in terms of number of sun spots on the surface. Sunspots were observed in the early 17th century. It was first observed by Galileo Galilei.

Under Solar Cycle, the solar maximum and solar minimum refers to the periods of maximum and minimum sunspots respectively.

Magnetic polarity

The sun spots are magnetic in nature. The magnetic polarity of sun spots are constant throughout the cycle. It is opposite across the equator throughout a cycle. Also, the magnetic polarity reversed itself from one cycle to the other.