A kind of beer made from ancient yeast(酵母) up to 5, 000 years old has been shown to the public by Israeli researchers.

These researchers got six types of yeast from the old pottery(陶器)discovered in the Holy Land. The beer is believed to be similar to drinks enjoyed by the Pharaohs(法老) of ancient Egypt.

"I remember that when we first brought out the beer, sat around the table and drank, l said," We'll be good, or we'll all be dead in five minutes, '" said Aren Maeir, an archaeologist from Bar-Ilan University. "We lived to tell the story. "

In the past, beer was a basic thing—like bread—enjoyed by all the people in Israel. Since there was always a risk of water pollution, fermented(发酵的)beer and wine were considered much safer to drink.

Ronen Hazan and Michael Klutstein，two biologists at Hebrew University, came up with the idea of creating beer by using old yeast. With the help of beer expert Itai Gutman, the team used modern techniques to create a drink similar to wheat beer(小麦啤酒).

"The greatest wonder here is that the yeast has lived for thousands of years—just waiting to be dug and grown. "Dr. Hazan told reporters. "By the way, the beer isn't that bad. "

The team says they hope to make more beer by using ancient techniques instead in the future.

Do you know where this photo comes from?

Well, it ( take ) on Easter Island(复活岛). The island is in the south of the Pacific, and it is very difficult tourists to find its position. It is

covered with  (hundred) of huge stone statues(雕像). Each of them weighs several tons and some are more than 30 feet tall.nobody knows who built these statues and why and how they got there.

It(seem) that the statues have been made out of the top edge of a volcano(火山) on the island. A statue have been rolled or dragged down to the foot of the volcano. Then, it was stood upright and ropes were tied around it, which was made  ( act ) as a pulley (滑轮). Over a period of months, a statue could be walked for miles down to the ocean. In the end, it was (place) in line with other statues, all of them looking towards the center of the island.

Today, Easter Island(remain) one of the most famous historical places. It is likeopen-air museum, showing a fascinating but unfortunately lost culture.

There are many unsolved mysteries in life even though science, technology, and research have come a very long way. Let's enjoy the following unsolved mysteries.

The children have fun each other.

l found the wallet was empty when l it .

l think nothing else in the world is than love.