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  • BBC Science Focus Magazine

    YOUR QUESTIONS ANSWERED

    May 11, 2022 7 minutes
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    … WHY DO TREES HAVE SUCH SHALLOW ROOT SYSTEMS?

    … HOW OFTEN SHOULD I REBOOT/SHUT MY COMPUTER DOWN?

    … HOW DO THE CHAMBERS OF THE HEART WORK?

    … HOW DO TEARLESS ONIONS WORK?

    … ARE WE TOO SELFISH TO SAVE THE PLANET?

    … CAN A VASECTOMY BE REVERSED?

    … DO DOGS KNOW WHEN THEY FART?

    … WHAT IS SLEEP INERTIA?

    … WHAT IS BALL LIGHTNING?

    … WHY DO KIDS GO HYPERACTIVE WHEN IT’S WINDY?

    Email your questions to
    questions@sciencefocus.com

    or submit on Twitter
    @sciencefocus

    OUR EXPERTS

    DUNCAN GEERE
    Climate and environment writer

    DR PETER BENTLEY
    Computer scientist

    PROF ALICE GREGORY
    Sleep expert

    LUIS VILLAZON
    Science and technology writer

    PETE LAWRENCE
    Astronomy expert

    DR EMMA DAVIES
    Science writer

    DR CHRISTIAN JARRETT
    Psychologist and neuroscientist

    DR NISH MANEK
    Medical expert and GP trainee

    DR HELEN PILCHER
    Biologist and science writer

    A BULL, VIA EMAIL

    IF I FELL OUT OF A COMMERCIAL AIRCRAFT, WOULD I BE DEAD BEFORE I HIT THE GROUND?

    A commercial jetliner cruises at around 830km/h at an altitude of 10,000m. Quite apart from the fact that the doors are locked automatically while in flight, the pressure differential at that altitude is more than five tonnes per square metre. Aeroplane doors

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