La Brea tar pits still pumping out history

by Chris Owen on
The La Brea tar pits, just 7 miles west of downtown Los Angeles, have been a treasure trove for paleontologists for decades. Producing more than a million bones since their discovery, the sticky ponds that trapped living creatures tens of thousands of years ago are still pumping out history.

Work over the past few years has involved sifting through 23 boxed deposits and some 16,000 bones reports the Associated Press. Chief curator Dr. John Harris and lead excavator Carrie Howard have been going through the find, discovered in 2006 during the construction of an underground parking garage close to the tar pit location.

“We’re still trying to piece everything together” Harris said estimating it would take five
years to sort through, so long that work has been stopped on another area, Pit 91, where scientists have been working since 1989.

Pit 91 measures 28′ x 28′ and about 14 feet deep. 3′ square grids are used for excavation and after fossils are excavated, they are cleaned, identified, labeled, catalogued and put in storage where they have been made available for research by professionals and students from around the world.

Called Project 23: New discoveries at Rancho La Brea, the Page Museum, part of the Natural History Museum of Los Angeles, believes this find has the potential to double their collection by three to four million specimens.

Gadling listed the La Brea Tar Pits as one of the World’s Strangest Natural Wonders and it looks like the La Brea tar pits will still be pumping out history for some time to come.

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Flickr photo by jkritchter

Day at the Pits from Andy Chen on Vimeo.

Oldest human footprints will soon be on public view

by Sean McLachlan on

History buffs love to see the places where famous people walked, but how about the thrill of seeing where some of mankind’s earliest ancestors strolled by? Footprints dating back 3.6 million years were discovered at Laetoli in Tanzania by the famous paleontologist Dr. Mary Leakey back in 1976. The prints of three individuals and several animals had been pressed into a layer of ash deposited by a nearby volcano and became fossilized as more and more ash and dirt piled up and pressed the lower layers into a soft rock called tuff.

This find is of major importance to the study of human evolution but the site itself hasn’t been open to the public for 15 years. Now Tanzanian officials have announced that the footprints will again be on view. The prints are in the Ngorongoro Conservation Area, which already attracts about 400,000 tourists annually.

The tracks are those of three individuals walking upright. One walked in the footprints of another and all lead in the same direction. It’s unclear what hominid (early form of human) made the tracks, but several skeletons of the Australopithecus afarensis were discovered in the region and date to the same approximate period. The famous Lucy skeleton is an Australopithecus afarensis. The photo shows a reconstruction of one at the Cosmocaixa museum in Barcelona.

Scientists are currently studying how to open the site with minimal impact. They expect the process to take up to two years.

This is the latest round in a continuing controversy over how to preserve the prints. Some scientists say the entire section of rock should be removed and placed in a museum. Others say they’re much more compelling where they were found. A protective sealant was placed over the prints in 1995 and the whole area was covered with earth. While this has kept the prints in good condition, it means nobody gets to appreciate them. Hopefully Tanzanian scientists will find a way to preserve the prints while allowing visitors to enjoy this one-of-a-kind discovery.

[Photo courtesy user Esv via Wikimedia Commons]