Evolution

Comb Jellies
5:01 am
Thu May 22, 2014

A Shimmery Sea Blob From The San Juans May Have Just Upended Evolutionary History

Comb jellies may actually represent the first branch on animals' evolutionary tree.
Smithsonian Institution

A squishy little sea creature fished out of the Salish Sea may be rewriting our history of how animal life first evolved.

They’re called comb jellies, and they have nothing to do with hair products. They are translucent blobs that propel themselves with rows of shimmering threads called cilia.

Scientists captured specimens at the University of Washington Friday Harbor Laboratories and analyzed their genomes, coming to two pretty startling conclusions. First, these animals have nervous systems, but they look almost nothing like those of people or fish, or any other animal on Earth.

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Food
12:59 pm
Fri December 28, 2012

An Evolutionary Whodunit: How Did Humans Develop Lactose Tolerance?

Thousands of years ago, a mutation in the human genome allowed many adults to digest lactose and drink milk.
iStockphoto.com

Originally published on Fri December 28, 2012 9:41 am

Got milk? Ancient European farmers who made cheese thousands of years ago certainly had it. But at that time, they lacked a genetic mutation that would have allowed them to digest raw milk's dominant sugar, lactose, after childhood.

Today, however, 35 percent of the global population — mostly people with European ancestry — can digest lactose in adulthood without a hitch.

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