What temperature is too hot for life to exist deep beneath the seafloor? An international research team is answering this question. What they learn will help define the borders of life inside Earth. Join their scientific mission of discovery by submitting your own guess about the temperature that is too hot for life deep inside Earth. Submit your estimate in degrees Celsius. The winner(s) will receive a Deep Carbon Observatory baseball cap and a sticker commemorating the T-Limit expedition.
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