Selbert

Selbert

    This creates the conditions for sea grass beds
    0:38
    sea cucumbers clean and oxygenate the seafloor
    0:31
    This act is called visceration
    0:30
    extracts oxygen from seawater
    0:26
    they are generally characterized by their long
    0:26
    Sea cucumbers are members of the phylum Echinodermata
    0:31
    the shifts in ice that have shaped our planet
    0:24
    Computer models forecast
    0:30
    Carbon dioxide levels in the atmosphere have been rising
    0:28
    this cooling abruptly reversed about 150 years ago
    0:25
    they began to melt
    0:26
    carbon dioxide has been relatively low
    0:29
    Throughout Earth history, climate has varied greatly
    0:29
    it as the Ice Age
    0:32