Where Mono first settled into the lymph nodes of a woman named Monesha

David Pogue bloopers from NOVA “Hunting the Elements,” which airs tonight. The two-hour special takes a look at nature’s building blocks and where they come from. 

Watch Elemental Bloopers on PBS. See more from NOVA.

Look- the tibia of a mastodon!
The story of a bulldozer operator who discovered a mammoth (get it?) trove of bones from ice age mammals, including mammoths, ground sloths and mastodons. 
-TG

Look- the tibia of a mastodon!

The story of a bulldozer operator who discovered a mammoth (get it?) trove of bones from ice age mammals, including mammoths, ground sloths and mastodons. 

-TG

"Forensic DNA testing can be done very quickly—in a few hours. Typically the protocol is PCR"—that’s polymerase chain reaction, a technique for making multiple copies of a piece of DNA—"from tiny amounts of sample, followed by gel separation of DNA size variants"

-George Church, Professor of Genetics at Harvard Medical School and Director of the Center for Computational Genetics.

These “size variants,” which are DNA chunks of different lengths, together create a unique “fingerprint” that can be used to identify an individual.

(Via Kate Becker of NOVA PBS)