Overview â The distinctive tiger shark lives in both coastal and open seawaters, usually from the surface to around 459 feet. Young members of this species sport black stripes arranged over their otherwise gray backs and sides. These stripes can fade as the shark ages, making it look more like a great white than a tiger shark. Somehow it seems appropriate that this nocturnal, aggressive shark prefers dark, murky waters.
Obesity is one of the most important causes of bowel cancer [6, 9, 10]. Some groups have estimated that being overweight or obese causes about 11-14% of bowel cancer cases [10, 15, 17, 18]. Many large studies have found that bowel cancer is more common in overweight or obese people [7, 22-25].
That's bad luck -- and it's the primary cause of most cancer cases, says a Johns Hopkins Medicine research study. Roughly two-thirds of cancers in adults can be attributed to random mutations in genes capable of driving cancer growth, said two scientists who ran statistics on cancer cases. That may sound jaw-dropping.And Johns Hopkins anticipates that the study will change the way people think about cancer risk factors.oughly two-thirds of cancers in adults can be attributed to random mutations in genes capable of driving cancer growth, said two scientists who ran statistics on cancer cases. That may sound jaw-dropping. And Johns Hopkins anticipates that the study will change the way people think about cancer risk factors.