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Because dinosaurs were warm blooded.

• openstack 11y ago
  Then why did they go extinct?
  • hoodoof 11y ago
    Due to a gigantic asteroid strike. Interestingly, crocodiles, which are cold blooded creatures, survived OK.
    • MrQuincle 11y ago
      This article doesn't make the connection, but it's an interesting hypothesis to assume that all cold blooded creatures that were big couldn't maintain their body temperature after a drop in temperature from a comet impact, but that creatures that were small already were better in coping with fluctuations because of their smaller size.
      • TheCoreh 11y ago
        It's more likely that large creatures couldn't get enough food, because sunlight was blocked by dust clouds and a lot of plant life died as well. The percentage of Oxygen on the atmosphere might also have been affected, making large lifeforms unable to function efficiently enough.
      • greggman 11y ago
        The thought the latest theory was the entire earth was engulfed in flames from the impact and killed almost everything except stuff underground / underwater http://www.radiolab.org/story/dinopocalypse/ http://www.radiolab.org/story/dinopocalypse/
        • kbart 11y ago
          I didn't listen to this audio, but if this were true, shouldn't geologist have already discovered a layer of ashes spanning the whole world?
          • greggman 11y ago
            they did.
• yareally 11y ago
  Birds are also scientifically classified as dinosaurs[1]. > "Avialae ("bird wings") is a clade of dinosaurs containing their only living representatives, the birds." [1]https://en.wikipedia.org/wiki/Avialae https://en.wikipedia.org/wiki/Avialae
• bryanlarsen 11y ago
  As the article states, some dinosaurs were definitely warm blooded, some were definitely cold blooded, but where in the tree the transition happened is very much unknown.