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Egypt Opens 2 Pyramids to Public

People walk in front of the Bent Pyramid of Sneferu, that was reopened after restoration work, in Dahshur, south of Cairo, Egypt July 13, 2019. REUTERS/Mohamed Abd El Ghany
People walk in front of the Bent Pyramid of Sneferu, that was reopened after restoration work, in Dahshur, south of Cairo, Egypt July 13, 2019. REUTERS/Mohamed Abd El Ghany
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Egypt Opens 2 Pyramids to Public

People walk in front of the Bent Pyramid of Sneferu, that was reopened after restoration work, in Dahshur, south of Cairo, Egypt July 13, 2019. REUTERS/Mohamed Abd El Ghany
People walk in front of the Bent Pyramid of Sneferu, that was reopened after restoration work, in Dahshur, south of Cairo, Egypt July 13, 2019. REUTERS/Mohamed Abd El Ghany

Egypt opened to visitors on Saturday and for the first time since 1965 the 101-meter "Bent" Pyramid built for pharaoh Sneferu.

Tourists will now be able to clamber down a 79-meter narrow tunnel from a raised entrance on the pyramid's northern face, to reach two chambers deep inside the 4,600-year-old structure that lies just south of Cairo.

They will also be able to enter an adjoining 18-meter high "side pyramid", possibly for Sneferu's wife Hetepheres.

The "Bent" Pyramid is one of two built for Fourth Dynasty founding pharaoh Sneferu in Dahshur, at the southern end of the Memphis necropolis that starts at Giza.

Its appearance is unusual. The first 49 meters, which have largely kept their smooth limestone casing, are built at a steep 54 degree angle, before tapering off in the top section.

The angular shape contrasts with the straight sides of Sneferu's Red Pyramid just to the north, the first of ancient Egypt's fully formed pyramids and the next step towards the Great Pyramid of Giza.

Architects changed the angle when cracks started appearing in the structure, said Mostafa Waziri, secretary general of Egypt's Supreme Council of Antiquities.

"Sneferu lived a very long time...the architects wanted to reach the complete shape, the pyramid shape," Mohamed Shiha, director of the Dahshur site, said.

"Exactly where he was buried -- we are not sure of that. Maybe in this (Bent) pyramid, who knows?"

Authorities are seeking to promote tourism at Dahshur, about 28km south of central Cairo. The site lies in the open desert, attracts just a trickle of visitors, and is free of the touts and bustle of Giza.

As they opened the pyramids, archaeologists presented late-period mummies, masks, tools and coffins discovered during excavations that began near the Dahshur pyramids last year and are due to continue.

"When we were taking those objects out, we found...a very rich area of hidden tombs," Waziri said.

Archaeologists also unveiled the nearby tomb of Sa Eset, a supervisor of pyramids in the Middle Kingdom, which has been closed since its excavation in 1894 and contains finely preserved hieroglyphic funerary texts.

Foreign ambassadors were invited to attend the archaeological announcements.

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Varieties

Study Documents Extinction Threats to World's Freshwater Species

African tiger fish (Hydrocynus vittatus) swim in the Okavango river, Botswana in this undated handout picture. Michel Roggo/Handout via REUTERS/File Photo
African tiger fish (Hydrocynus vittatus) swim in the Okavango river, Botswana in this undated handout picture. Michel Roggo/Handout via REUTERS/File Photo
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Study Documents Extinction Threats to World's Freshwater Species

African tiger fish (Hydrocynus vittatus) swim in the Okavango river, Botswana in this undated handout picture. Michel Roggo/Handout via REUTERS/File Photo
African tiger fish (Hydrocynus vittatus) swim in the Okavango river, Botswana in this undated handout picture. Michel Roggo/Handout via REUTERS/File Photo

Freshwater environments cover about 1% of Earth's surface while accounting for more than 10% of known species. Like many marine and terrestrial ecosystems, however, they are in distress. A new study looking at some of the denizens of freshwater habitats offers a stark illustration of this biodiversity predicament.

Researchers assessed the status of 23,496 species of freshwater animals in groups including fishes, crustaceans such as crabs, crayfish and shrimp and insects such as dragonflies and damselflies, finding 24% of them at a high risk of extinction, Reuters reported.

"Prevalent threats include pollution, dams and water extraction, agriculture and invasive species, with overharvesting also driving extinctions," said conservationist Catherine Sayer, lead author of the study published on Wednesday in the journal Nature.

Sayer heads the freshwater biodiversity unit at the International Union for Conservation of Nature (IUCN), the organization that tracks the status of species globally.

Some of the freshwater species deemed at high risk bear exotic names such as the mini blue bee shrimp of Sulawesi, the Seychelles duskhawker dragonfly, the Atlantic helicopter damselfly of Brazil, the daisy burrowing crayfish of Arkansas and fishes such as the shortnose sucker of Oregon and California and the humpbacked mahseer of India.

The study filled a gap in data on freshwater biodiversity. The studied species were selected because their diverse positions within food webs present a holistic view of the health of freshwater ecosystems globally.

These species inhabit inland wetlands such as lakes, rivers, swamps, marshes and peatlands - areas that the researchers said have been reduced by more than a third since 1970. Other research has documented the status of mammals, birds, reptiles and amphibians that share these freshwater ecosystems and often face their own unique threats.

Of the animal groups investigated in the new study, the highest threat levels were documented in the crustaceans (30% threatened) followed by the fishes (26%) and the dragonflies and damselflies (16%).

"Freshwater ecosystems are ecologically important because of the diversity of species they support. Some of them may have high numbers of species that are restricted just to those systems - a single lake or pool or river," said Northern Arizona University freshwater conservationist Ian Harrison, a member of the IUCN Species Survival Commission and a study co-author.

"They are also important in terms of the ecosystem services they supply: carbon sequestration in terms of peat bogs; food in terms of fisheries; medicines from plants; as well as cultural and aesthetic values. Freshwater reeds are used for building houses in some areas. Freshwater ecosystems contribute $50 trillion in value annually by their provision of natural processes supporting human well-being," Harrison said.

The researchers identified four places globally with the largest number of threatened freshwater species: Lake Victoria in Africa, Lake Titicaca in South America and regions in western India and Sri Lanka.

Lake Victoria, the world's second-largest freshwater lake by surface area, is bordered by Kenya, Tanzania and Uganda. The key threats identified to species were pollution, overfishing, agriculture and invasive species, particularly the Nile perch and water hyacinth. Lake Titicaca is situated on the border between Peru and Bolivia in the Andes. It was found to face a similar cadre of threats as Lake Victoria. Both lakes boast a rich diversity of fishes.

"There is an urgent need to focus on freshwater conservation to halt the decline in species, and this can be achieved through a more integrated management of water resources that can include the maintenance of ecosystem functions within the process of addressing the obviously important human needs for water," Harrison said.

"The particular value of this study is that it shows us which river basins, lakes, et cetera, are the ones where the conservation challenges are most urgent and serious," Harrison added. "And we can compare this to what we know about existing protections, and identify where there are gaps and where there are conservation needs. And it acts as a baseline of information from which we can track progress, to see if our actions are reducing threats."