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After 200 million years, all-male future spells doom for tuatara reptiles http://apocadocs.com/s.pl?1215006952 
The only survivors in the wild of an order of reptiles that scampered with dinosaurs could be wiped out because climate change will turn them all into males.
The gender of tuataras, an ancient type of reptile with three eyes, is determined by the temperatures that the embryos are kept at when in the egg. Global warming means that the reptiles, regarded as living fossils, face the threat of dying out in the wild because of a terminal shortage of females.
Only males will be born in nests where the eggs have been kept at temperatures of 22.25C (72.05F) whereas females are guaranteed only at temperatures lower than 22.1C. 
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What a Spartan existence.
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