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This time last week NASA's Perseverance rover successfully touched down on Mars, just days after craft from the UAE and China started orbiting the red planet. There was also more Martian excitement with the news that Europe's ExoMars mission had spotted hydrogen chloride in the Martian atmosphere.   If you haven't already, do listen to the latest Physics World Stories podcast, where Luther Beegle and Kelsey Moore discuss how Perseverance will search for ancient microbial life on Mars. Matin Durrani, editor-in-chief, Physics World

THIS WEEK'S HEADLINES

Earth sciences, Planetary science | Research update Iridium in undersea crater confirms asteroid wiped out the dinosaurs Rock cores from Chicxulub crater contain elements associated with Cretaceous–Paleogene extinction event Particles and interactions, Quantum computing | Research update Quantum computer captures physics of high-energy particles Proof-of-principle effort used IBM Q chip to reproduce quantum features of parton showers Biophysics | Research update Air purifiers could spread viruses in confined spaces Health and safety guidelines should be revised to consider the effects of air purifiers on droplets in confined spaces, say researchers 2D materials, Superconductivity | Research update Twisted trilayer graphene could help make high-temperature superconductors Superconductivity is more robust in a three-layer system compared to its two-layer counterpart Diagnostic imaging | Research update Monochromatic X-ray source could make mammograms safer A prototype monochromatic X-ray source creates high-quality breast images at far lower doses than current mammography systems

EXPLORE MORE

Agriculture, Gravity | Podcast How gravitational waves could reveal flaws in a black-hole theorem, satellites lead an agricultural revolution This week's podcast features black-hole and satellite-imaging experts Nuclear power | Feature Ten years after Fukushima: could new fuels make nuclear power safer? Michael Allen investigates claims from academia and industry that the next generation of nuclear fuels could reduce the risk of accidents Culture, history and society, Environment and energy | Opinion and reviews A million years into the future: why you need a dose of very deep thinking Robert P Crease discovers why a nuclear-waste programme in Finland can help us to envisage the world a million years from now Radiotherapy, Sponsored | Analysis SRS treatment planning: where automation yields precision, speed, workflow efficiency Elekta's dose optimization software Leksell Gamma Knife Lightning is transforming the treatment planning of intracranial stereotactic radiosurgery Diversity and inclusion | Careers Fostering a culture of inclusivity The American Physical Society's National Mentoring Community helps students from under-represented minorities find the right support and mentorship

OUR LATEST WEBINARS You can explore our full selection of webinars on our website.

Medical physics, Sponsored | Webinar Real-time treatment verification with the Integral Quality Monitor (IQM) System Join the audience for a live webinar on 26 March 2021 sponsored by Elekta Medical physics, Sponsored | Webinar Quantitative MRI for biological image-guided adaptive radiotherapy Join the audience for a live webinar on 18 March 2021 sponsored by Elekta Environment and energy, Sponsored | Webinar Dynamic light scattering in electrochemical energy conversion systems Join the audience for a live webinar on 16 March 2021 sponsored by HORIBA Scientific, in partnership with The Electrochemical Society Materials, Sponsored | Webinar Graphene and its supercapacitor applications Join the audience for a live webinar on 10 March 2021 sponsored by Hiden Analytical and COMSOL Inc., in partnership with The Electrochemical Society

INNOVATION SHOWCASES You can explore our full selection of innovation showcases on our website.

Join webinar: Equation-based modelling   Tune into this webinar on 4 March 2021 to see how you can set up and solve models using your own equations. The COMSOL® software's equation-based interfaces can be used either on their own or together with the built-in physics interfaces. Mix and match them to let your own custom partial differential equations interact with, for example, structural mechanics, electromagnetics, heat transfer – or all three. Register today!

VACANCIES FROM PHYSICS WORLD JOBS

Application Engineer South Korea (Physics, EE), South Korea Chair Professor/Professor/Associate Professor/Assistant Professor, Hong Kong Research Fellow in Coherent Diffraction Imaging, UK Service Engineer in Electron Microscopy, Belgium Physicists or Engineer as Scientist for Accelerator Physics, Germany Associate Director for Experimental Nuclear Physics, US Peoples Fellowship 2021 (Associate Scientist), US Postdoctoral Experimental Physicists – Short Pulse HEDP, US PhD Studentships in Atomic Molecular Optical and Positron Physics (AMOPP), UK Lead Mechanical Engineer (Multiple Openings), US

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