This sped-up video illustrates the freezing and thawing process for hibernating wood frogs. When winter brings fall to a close, these frogs hunker down in dead leaves and moss that cover the ground, which serve as their shelter for the months ahead. As the cold sets in, frost creeps across the plant matter and reaches the immobile frogs, who then begin the process of releasing a cryoprotectant that keeps their bodies from drying out as they freeze. Making sure ice doesn’t form in their cells is
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This sped-up video illustrates the freezing and thawing process for …
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FacebookPBS NewsHour
The Alaska wood frog (Rana sylvatica) has an extraordinary ability to survive the winter: it can freeze a large part of its body and then fully thaw in spring. Falling temperatures trigger a massive production of glucose, which acts as a natural antifreeze and reduces the formation of harmful ice crystals inside cells. During the freezing period, up to about 65 % of its body water can solidify. At this time, breathing, heartbeat, blood circulation and brain activity cease, and metabolism comes n
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Time-lapse video of a wood frog (Rana sylvatica) thawing.
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