Spade-Toothed Whale
Why in News: Recently, scientists identified a spade-toothed whale found dead on a beach in New Zealand. This species is incredibly rare and has never been observed alive before.
About Spade-Toothed Whale:
- Rarest Whales: They are the rarest whales globally, never sighted alive.
- First Discovery: Initially described in 1874 based on a lower jaw and two teeth found at New Zealand’s Chatham Islands.
- Confirmation as a Species: Skeletal remains from two other specimens discovered near islands in New Zealand and Chile provided conclusive evidence of a new species.
- Recent Strandings: Additional specimens were found stranded off New Zealand’s North Island in 2010 and 2017, contributing to the limited knowledge of this species.
- Habitat Mystery: Little is known about their habitat. These creatures dive deep for food and surface infrequently, making it challenging to pinpoint their location beyond the southern Pacific Ocean, which hosts some of the world’s deepest ocean trenches.
- Unknowns: Their population size, diet, and precise habitat remain mysteries due to their elusive nature and sparse sightings.
- IUCN Red List: Currently listed as Data Deficient due to insufficient data on population trends and threats.
MV Sea Change
Why in News: Recently, the MV Sea Change, the world’s inaugural commercial passenger ferry powered entirely by hydrogen fuel, was launched at the San Francisco Ferry Building.
About MV Sea Change:
- Pioneering Technology: It is the world’s first commercial passenger ferry powered entirely by zero-emission hydrogen fuel cells.
- Construction and Ownership: Built by All American Marine Shipyard for the shipowner SWITCH Maritime, the ferry accommodates up to 75 passengers.
- Engineering Design: Designed by Incat Crowther, the vessel employs hydrogen-powered fuel cells to generate electricity for electric motors. It can operate for approximately 16 hours and cover about 300 nautical miles between refueling sessions.
- Performance Specifications: The ferry can achieve speeds up to 20 knots, with a service speed ranging from 8 to 12 knots.
- Fuel and Emissions: It uses hydrogen (H2) fuel cells that combine hydrogen from storage tanks with oxygen from the air to produce electricity. Unlike diesel-powered ferries, the MV Sea Change emits only heat and water vapor as byproducts. Passengers can even drink the condensed water vapor collected from an onboard water fountain.
Davis Strait
Why in News: Recently, a microcontinent was discovered in the Davis Strait, located between Canada and Greenland.
About the Newly Discovered Microcontinent:
- Discovery Location: Discovered in the Davis Strait, a significant waterway between Canada’s Baffin Island and Greenland.
- Formation History: The Davis Strait formed millions of years ago due to tectonic plate movements, reshaping the Earth’s crust and resulting in the formation of thick continental crust in the ocean. This newly discovered landmass is now designated as a primitive microcontinent.
- Name and Origin: Named the Davis Strait proto-microcontinent, it emerged from the tectonic evolution of the region’s strait.
Key Facts about Davis Strait:
- Geographical Context: Known as the northern arm of the Atlantic Ocean, the Davis Strait lies north of the Labrador Sea, separating southwestern Greenland and southeastern Baffin Island in Nunavut, Canada.
- Significance and Navigation: It forms a crucial part of the Northwest Passage route through the Canadian Arctic Archipelago, linking the Atlantic and Pacific Oceans. Baffin Bay lies between Baffin Island and Greenland’s west coast.
- Geological Features: Characterized by complex geological formations such as underwater basins and ridges created by strike-slip faulting along the Ungava fault Zone around 45 to 62 million years ago.
- Ocean Currents and Climate: Two ocean currents, the western Greenland current and the Labrador current, influence the Davis Strait. They bring varying temperatures and concentrations of ice, affecting navigation and marine life.
- Dimensions and Depth: The Davis Strait spans approximately 400 miles north to south and is 200 to 400 miles wide, with water depths ranging from 1000 to 2000 meters.
- Winter Conditions: Not navigable during winter due to heavy ice cover, floating icebergs, and dense fog, particularly along the western shores.
- Environmental Impact: The strait’s unique currents and ice dynamics contribute to distinct environmental conditions, influencing marine ecosystems and navigation routes in the region.