Identical Triplets Rafaela, Rocheli, and Tagiane Bini all married on the same day at the same ceremony!

Protein called hemoglobin found in our blood cells carry oxygen to cells.

Hemoglobin consists of four separate polypeptide chains, and each chain is specifically designed to carry a single iron atom in its heme group. Iron has a natural affinity for oxygen, which it carries to all our cells.

When lead is present in our bloodstream, the placement of iron in the heme structure is blocked, and so hemoglobin cannot carry oxygen.

This is what's referred to as lead poisoning. It occurs when lead is breathed or consumed through contaminated water or food. Lead poisoning causes serious health problems, including brain damage and anemia.

Source 

Lead Displaces Iron - https://biology-forums.com/index.php?action=gallery;sa=view;id=41367

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Thanks to a cold environment, which causes a slow metabolism, bowhead whales (Balaena mysticetus) can live for more than 200 years - nearly 3 times longer than the average human, making it the longest-lived mammal.

Bowhead whales can grow 14 to 18 m (46 to 59 ft) in length, and unlike most whales, they lack a dorsal fin. This thick-bodied species can weigh from 75 to 100 tonnes (82 to 110 US tons). They live entirely in fertile Arctic and sub-Arctic waters, unlike other whales that migrate to low latitude waters to feed or reproduce. The bowhead also has the largest mouth of any animal.

Of course, following around a whale to measure how long it lives is practically impossible. Researchers discovered this amazing feature in 2007, when a 15 m ...