Ashwin Srinivasan SciTech Editor

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  • Tropical tectonic collisions trigger Earth’s ice ages

    Earth goes through periodic ice ages — years or decades when global temperatures become frigid, resulting in ice sheets and glaciers covering continents far beyond the planet’s polar caps. In fact, Earth has been through three major ice ages in the last 540 million years. Scientists have long wondered what triggers these chilling times, and a joint study from the Massachusetts Institute of Technol...

    SciTech | March 25, 2019
  • Serious vulnerability found in 4G and 5G

    With each generation of new cellular network technology, engineers have tried to eliminate security flaws that plagued the earlier version. Third generation networks were vulnerable to an exploit in Signaling System 7, a protocol used by telecommunications companies to route text messages and phone calls. 4G was designed to mitigate these flaws, but [recent studies](

    SciTech | March 4, 2019
  • Antarctic ice shelves fracture under pressure

    The Antarctic ice shelves are one of the main victims of climate change. A report published in Nature Communications by a team of researchers co-led by the University of Cambridge finds that the stability of a floating Antarctic ice shelf is threatened by meltwater lakes on its surface. The flexing of ice shelves has been hypothesized and simulated by computer models in the past, but this study ...

    SciTech | February 25, 2019
  • Perovskite solar cells bring flexibility and lower cost

    Solar cells are often heralded as the future in renewable energy technology, but have been hindered by their inflexible composition and high costs. In recent years, researchers have been developing improved solar cells using perovskite, a mineral composed primarily of calcium titanate. A new report published in Science from scientists at the Georgia Institute of Technology, University of Califor...

    SciTech | February 18, 2019
  • Using the heart to power pacemakers

    The heart is the most essential human organ, regulating blood flow to every other part of the body. Engineers at Dartmouth College’s Thayer School of Engineering have developed a device that can convert the kinetic energy of this important organ into electricity to power implantable devices.

    SciTech | February 11, 2019