Vande Bharat Express, also known as Train 18, is an Indian higher-speed rail intercity electric multiple unit. It was designed and built by Integral Coach Factory (ICF) at Perambur, Chennai under the Indian government's Make in India initiative over a span of 18 months. The unit cost of the first rake was given as ₹1 billion (US$14 million), though the unit cost is expected to go down with subsequent production. At the original price, it is estimated to be 40% cheaper than a similar train imported from Europe. The train was launched on 15 February 2019, by which date a second unit will have been...

Lenticular clouds (Latin: Lenticularis lentil-shaped, from lenticula lentil) are stationary clouds that form mostly in the troposphere, typically in perpendicular alignment to the wind direction. They are often comparable in appearance to a lens or saucer. Nacreous clouds that form in the lower stratosphere sometimes have lenticular shapes. There are three main types of lenticular clouds: altocumulus standing lenticular (ACSL), stratocumulus standing lenticular (SCSL), and cirrocumulus standing lenticular (CCSL), varying in altitude above the ground. Because of their unique appearance, they have...

The 1964 Alaskan earthquake, also known as the Great Alaskan earthquake and Good Friday earthquake, occurred at 5:36 PM AKST on Good Friday, March 27. Across south-central Alaska, ground fissures, collapsing structures, and tsunamis resulting from the earthquake caused about 131 deaths.Lasting four minutes and thirty-eight seconds, the magnitude 9.2 megathrust earthquake remains the most powerful earthquake recorded in North American history, and the second most powerful earthquake recorded in world history. Six hundred miles (970 km) of fault ruptured at once and moved up to 60 ft (18 m), releasing...