Class

New class of killer T cells may prevent autoimmune diseases | Science

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The price for a vigilant immune system that can pounce on tumor cells or pathogens is occasional friendly fire—an autoimmune attack. Scientists have now identified a new type of human T cell that quells assaults on healthy tissues, a finding that could suggest treatments for conditions as diverse as lupus and cancer. “It’s a major … Read more

Record-Breaking Supernova Is Part of a New Class of Objects

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The night sky is filled with blips and flashes, a constantly changing sea of lights. Some of these changes are from Earth-bound happenings such as aircraft flying overhead, but some are from distant sources in space. Astronomers hunt for these fleeting phenomena, known as astronomical transients, by observing the sky regularly and looking for differences … Read more