Ian Sample

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Health officials collect a swab sample from a man to test for   Covid-19   at a testing centre  in Hyderabad, India. Photograph: Noah Seelam/AFP via Getty Images

A major research effort is under way to understand whether coronavirus can spread through tiny airborne particles that are released by infected people(...)

New Horizons principal investigator Alan Stern gives a high five to Mission Operations Manager Alice Bowman after the team received signals from the spacecraft that it is intact. Photograph: EPA

Nasa scientists were celebrating after a spacecraft “phoned home” to confirm it had successfully performed the most distant space flyby in history in (...)

Experts watch their screens at the control centre of the European Space Agency in Darmstadt, Germany. Photograph: Boris Roessler/AP

A European spacecraft has become the first in history to rendezvous with a comet after a seven-minute burn of the probe’s thrusters brought it within (...)