安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- The most detailed look yet at how early humans left Africa
They identified waves of migration across the Arabian Peninsula and Levant region during four periods: between 106,000 and 94,000 years ago; 89,000 to 73,000 years ago; 59,000 to 47,000 years ago
- Humans’ oldest maternal ancestors may have arisen in southern . . .
Humans’ maternal ancestors may have arisen 200,000 years ago in southern Africa But new DNA findings don’t offer a complete picture of how and when Homo sapiens emerged
- THE FORGOTTEN CONTINENT - aaas. org
DNA has yet been recovered from them Many researchers say that there are ways to explain the existing Asian fossils without resorting to continuity with hybridization The Zhirendong hominins, for instance, could represent an exodus of early modern humans from Africa between 120,000 and 80,000 years ago Instead of remaining in the Levant in the
- World’s least-visited countries: Why you should travel to . . .
There are 607 islands here, but put them together and they add up to a mere 271 square miles of land – and that’s spread across nearly 2 6 million square miles of water Many of the islands
- Australia and Oceania: Physical Geography - Education
The few native land animals in Australia and Oceania are unusual Australia and Oceania is the only place in the world that is home to monotremes —mammals that lay eggs All monotremes are native to Australia and Papua New Guinea There are only five living species: the platypus (Ornithorhynchus anatinus) and four species of echidna
- Africa: Physical Geography - Education | National Geographic . . .
People of the Sahara have been producing salt for thousands of years by creating pits and filling them with water to leach out the salt The water is then heated to a boil; as it evaporates, the salt is left behind Salt production remains is a major industry and job source in this part of Africa
- Where lions once ruled, they are now quietly disappearing
There are half as many African lions than there were 25 years ago Conservation programs aim to protect the disappearing species by promoting human-lion cohabitation across the African savanna
|
|
|