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Solar plane

An airplane fueled only by solar power successfully completed the first of five legs in a tour across America. In 18 hours and 18 minutes, the plane flew from San Francisco, CA to Phoenix, AZ. It is expected to arrive in New York in about two months, depending on weather and allowing for 10 day breaks for conferences at each stop. 

The plane is as wide as a jumbo jet, yet weighs about the same as a car and travels at an average speed of 69 kilometers per hour (43 mph). The wings of the plane are covered in 12,000 solar cells which charge four large batteries, allowing it to continue flying in the dark. The goal is to make a trip around the globe in 2015.

More info: http://usat.ly/15shRVp

Angkor Wat

Awesome aerial view of Angkor Wat.

                    Angkor Wat is a temple complex at Angkor, Cambodia, built for the king Suryavarman II in the early 12th century as his state temple and capital city. As the best-preserved temple at the site, it is the only one to have remained a significant religious centre since its foundation — first Hindu, dedicated to the god Vishnu, then Buddhist. It is the world's largest religious building

Great Monoliths of the Ancient World

Monoliths (aka menhirs or obelisks) are upright stones that have been used to create impressive structures around the world. These great monuments can appear on their own, or as part of a group (e.g. stone circles, temples, tombs etc).

The erection of these monoliths mainly took place in the Neolithic, later continuing into the Bronze Age. They were typically hewn from the land and raised on sacred sites that our ancestors deemed worthy of honouring. Their size varied considerably, but their shape is generally uneven and squared, often tapering towards the top. 

A number of ancient Egyptian obelisks are known to have survived, plus the "Unfinished Obelisk" found partly hewn from its quarry at Aswan. Had it have been erected, it would have been the tallest megalith in the world! These obelisks are now dispersed around the world, and fewer than half of them remain in Egypt.

It was said that many of the ancient obelisks were used to mark the passing of a royal personages (e.g. the Karnack Obelisk is associated with King Thutmose I, and the Stellae of Axum with the Queen of Sheba). Even the Great Menhir of Er-Grah is built next to an ancient tomb suggesting it is a grave marker worthy of a significant hero or king from the Neolithic era.

It is also said the pyramids and obelisks might have been inspired by previously overlooked astronomical phenomena connected with sunrise and sunset: the zodiacal light and sun pillars respectively.