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The article focuses on the recent sentencing of prominent Russian physicists, including Alexander Shiplyuk, to lengthy prison terms for treason amid Russia's crackdown on scientists. Topics include the secretive nature of the trials, the broader campaign against scientists working in sensitive military fields, and the impact of these arrests on international scientific collaboration and research.

The article focuses on the challenges faced by Ukraine in countering Russian missile attacks, particularly the effectiveness of American-supplied Patriot missiles in intercepting ballistic missiles and the increasing urgency for air defense amid escalating assaults by Russia.

The article discusses that Ukrainian President Volodymyr Zelensky has urgently headed to Washington for Western support as Russia targets Kyiv with an intense salvo of ballistic missiles, leading Russian President Vladimir Putin to celebrate waning Western support for Ukraine.

It is Saturday evening, the second day of summer, and the air around Marcus Garvey Park in Harlem is filled with the scent of blossoming linden trees and the sound of West African drums. Across the street from the park is 2002 Fifth Avenue, a new seven-story cream and red brick luxury co-op with a doorman, $1 million apartments and a lobby with a fireplace. [ABSTRACT FROM PUBLISHER]

An experimental X-43 pilotless plane broke the world speed record for atmospheric engine. It flew at a speed of 4,780 miles an hour, seven times the speed of sound according to National Aeronautics & Space Administration. The hypersonic aircraft, a cross between a jet and a rocket, was dropped from the wing of a modified B-52 bomber and boosted by an auxiliary rocket to an altitude of nearly 100,000 feet.

This article presents information on National Aeronautics & Space Administration (NASA's) endeavor to develop advanced jet engines. An experimental unmanned jet called the X-43 is being readied for a dash at the edge of space which could reach a speed of 5,000 miles per hour, seven times the speed of sound. If tested successfully it could become the first nonrocket, air-breathing plane to reach hypersonic speeds, a development engineers hope could lead to sending payloads into space much more cheaply or to aircraft that could whisk people to any point in the world within two hours. INSET: A New Kind of Jet Engines..

Discusses the experiment, called Acoustic Thermometry of Ocean Climate (ATOC), which was based on precise measurements of the speed of sound through oceans. Information on the ATOC consortium; Opposition to the experiment; Sponsors of the project.