By Mandi Bierly
Updated March 20, 2012 at 03:34 PM EDT
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Have you recovered from the Orca “wave wash” scene in the Frozen Planet premiere? We hope so, because nature’s emotional roller-coaster ride continues in the next installment of the seven-part series from the makers of Planet Earth. In “Summer” (premiering Sunday at 8 p.m. ET on Discovery), you’ll watch an adorable fur seal pup get caught between two 400 lb. bulls fighting for females. Warning: The battle is brutal, but the reunion between the lost pup and its mother is joyous. Watch it below. In our second exclusive clip, you just have to trust that the music and narrator Alec Baldwin wouldn’t sound so upbeat if the scene of a female caribou being chased by a herd of “amorous males” ended the way you’re worried it might…

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