17 MARCH 2026 - "Daily Current Affairs" Updates

GS Paper-1: Geography (Physical Geography)

⭐ Silverpit Crater

⭐ Why in the News

Recent scientific research has confirmed that the Silverpit Crater originated from a massive asteroid impact, which occurred millions of years ago.

⭐ Location

• The Silverpit Crater is located beneath the seabed of the North Sea, at a depth of about 700 metres.

• It lies roughly 80 miles off the coast of Yorkshire in the United Kingdom.

⭐ Discovery

• The crater remained buried under thick sediment layers for millions of years and was identified only in 2002.

⭐ Formation

• The structure was formed when a high-velocity extraterrestrial object struck the seabed approximately 43–46 million years ago.

⭐ Scientific Evidence

• Scientists have found shocked quartz and feldspar crystals in rock samples collected from nearby drilling sites.

• These minerals are typically formed only under extreme pressure conditions associated with asteroid impacts.

⭐ Size and Structure

• The crater has a diameter of about 3 kilometres.

• It is surrounded by a system of concentric fault rings, extending up to nearly 20 kilometres in width.

⭐ Geological Features

• The structure consists of multiple concentric circular fault patterns, characteristic of impact craters.

• It is considered a rare and well-preserved example of a hypervelocity impact crater.

⭐ Morphological Characteristics

• The crater displays a circular shape with a central peak, which is typical of large impact craters.

• Its features closely resemble the classical morphology observed in other known impact structures.

GS Paper-3: Environment & Biodiversity

⭐ Osbeckia zubeengargiana

⭐ Why in the News

Researchers from Gauhati University have recently discovered a new plant species named Osbeckia zubeengargiana in Assam.

⭐ Discovery and Location

• The species was identified in the grassland ecosystems of Manas National Park, located in the Baksa district of Assam.

⭐ Naming

• The plant has been named in honour of the renowned Assamese singer Zubeen Garg.

• It represents a rare instance of a plant species being named after a cultural personality.

⭐ Taxonomic Classification

• Osbeckia zubeengargiana belongs to the Melastomataceae family.

• This family is known for its diverse group of flowering shrubs found in tropical and subtropical regions.

⭐ Growth Form

• The plant is a perennial, erect shrub that can grow up to approximately 3.5 metres in height.

⭐ Floral Characteristics

• The plant produces delicate flowers ranging from purple to pink in colour.

• The flowers are tetramerous, meaning they have four petals.

⭐ Habitat Requirements

• The species thrives in moist soil conditions and is well adapted to grassland ecosystems.

• It contributes significantly to the floral diversity of its habitat.

⭐ Flowering and Fruiting Period

• The plant typically flowers and bears fruit between mid-September and January.

GS Paper-3: Environment & Biodiversity

⭐ Myiophanes kempi

⭐ Why in the News

Researchers have recently rediscovered the rare assassin bug species Myiophanes kempi in the limestone caves of the Andaman Islands, after it remained unreported for nearly a century.

⭐ Taxonomic Identity

• Myiophanes kempi is a slender-bodied assassin bug belonging to the family Reduviidae.

⭐ Discovery History

• The species was first described in 1924 by British entomologist William Edward China.

• Earlier records were based on specimens discovered in Siju Cave in Meghalaya, nearly a hundred years ago.

⭐ Habitat and Ecology

• The insect is specially adapted to subterranean (cave) environments and completes its entire life cycle in complete darkness.

• It acts as a specialised predator within cave ecosystems, feeding on small arthropods present in such habitats.

⭐ Key Characteristics

• The species possesses elongated raptorial forelegs, which it uses to efficiently capture and hold its prey.