️<unk>️<unk>️<unk>️  ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Scientists have found that key processes in the brains of polar bears are being disrupted by man-made chemicals such as stain repellents and water-proofing treatments. <unk> <unk> <unk> ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Researchers from Aarhus University in Denmark found that polychlorinated biphenyls (PCBs) are associated with a less dense penis bone.<unk> Researchers from Aarhus University in Denmark found that polychlorinated biphenyls (PCBs) are associated with a less dense penile bone. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Organohalogens contain at least one halogen such as fluorine or chlorine, and are used as solvents and pesticides, as well as in the making of dyes and drugs. PCBs were used to make paints and rubber goods in the 1930s, but were banned in 2001 after scientists discovered they can cause cancer.<unk> PCBs were used to make paints and rubber goods in the 1930s, but were banned in 2001 after scientists discovered they can cause cancer.<unk> PCBs were used to make paints and rubber goods in the 1930s, but were banned in 2001 after scientists discovered they can cause cancer. ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ ️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️<unk>️ Researchers found that areas of polar bears' brains where levels of...
<unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> Higher levels were associated with lower levels of key neurotransmitters.<unk> Higher levels were associated with lower levels of key neurotransmitters. <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk> <unk>