identical twins reproduce with siblings the resulting children are more related than half-siblings but less related than full siblings.

Children of double first cousins are double second cousins.

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double half first cousins Edit

Double half cousins arise when two half siblings reproduce with another set of half siblings. Double Half Cousins would share 2 grandparents. Unlike regular first cousins double half cousins would not be descended from a shared coupling of grandparents and would instead share a grandparent on both sides of their family. The coefficent of relationshipnecessarily represent the views of the organization.

Issues in Focus

Safety Standards for Crude-By-Rail Shipments

A series of accidents in North America in recent years have raised concerns regarding rail shipments of crude oil. Fatal accidents in Lynchburg, Virginia, Lac-Megantic, Quebec, Fayette County, West Virginia, and (most recently) Culbertson, Montana have prompted public outcry and regulatory scrutiny.

2014 saw an all-time record of 144 oil train incidents in the U.S.—up from just one in 2009—causing a total of more than $7 million in damage.

The spate of crude-by-rail accidents has emerged from the confluence of three factors. First is the massive increase in oil movements by rail, which has increased more than three-fold since 2010. Second is the inadequate safety features of DOT-111 cars, particularly those constructed prior to 2011, which account for