Scientists in Maryland have built the world’s first entirely handcrafted chromosome – a large looping strand of DNA made from scratch in a laboratory, containing all the instructions a microbe needs to live and reproduce.

All U.S. nonmilitary engagement with the world accounts for only 1.2% of the federal budget.

Japanese researchers have developed a frog with skin so transparent that its internal organs are visible, a boon to squeamish teens and to biologists who can study how organs develop and respond to tumors or toxins.

Hugh Hefner has a zoo license. He owns peacocks and spider monkeys.

The jagged border between Texas’ Travis and Williamson counties follows the divide separating the Colorado River and Brazos River watersheds.

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