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Monday, October 27, 2025

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Planetary defence

A good planetary defence system will probably take a century to build, but at least we are moving from theory to practical experiments.

Illustration of the DART spacecraft approaching the Dimorphos and Didymos asteroids. The biggest asteroid to hit the planet, Chicxulub on Mexico’s Yucatan peninsula 66 million years ago, was 10 kilometres in diameter. It caused the last great extinction: the world-wide firestorms and the five- or 10-year ‘asteroid winter’ that followed (due to the ash blocking out the sun) killed off all the non-avian dinosaurs and let the mammals take over, writes Gwynne Dyer. Image credit: NASA/Johns Hopkins APL/Steve Gribben
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BY GWYNNE DYER
September 22, 2022
Opinion | BY GWYNNE DYER | September 22, 2022

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Prime Minister Mark Carney has said Canada is willing to join a multilateral mission to enforce peace in the enclave. That same willingness must now extend to enforcing humanitarian access.  The Hill Times photograph by Andrew Meade

Ceasefire offers hope, but without access, Gaza’s famine will deepen

OpinionBY ONOME AKO
  • If Canada’s promise to enforce peace is to carry meaning, it must be matched by an equal determination to enforce access—the lifeline that makes any peace durable and real.

Ceasefire offers hope, but without access, Gaza’s famine will deepen

OpinionBY ONOME AKO
  • If Canada’s promise to enforce peace is to carry meaning, it must be matched by an equal determination to enforce access—the lifeline that makes any peace durable and real.

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