NASA plans for return to Moon to cost $28 billion

NASA on Monday revealed its latest plan to return astronauts to the Moon in 2024, and estimated the cost of meeting that deadline at $28 billion, $16 billion of which would be spent on the lunar landing module.

How to make a replication origin in multicellular eukaryotes

Loading of replicative helicases onto DNA is a key event during the initiation of chromosomal DNA replication. It takes place at specific chromosomal regions termed origins and is facilitated by the ORC protein complex. By ...

Dust may have controlled ancient human civilization

When early humans began to travel out of Africa and spread into Eurasia over a hundred thousand years ago, a fertile region around the eastern Mediterranean Sea called the Levant served as a critical gateway between northern ...

Mystery solved: Scientists trace source of Stonehenge boulders

Stonehenge, a Neolithic wonder in southern England, has vexed historians and archaeologists for centuries with its many mysteries: How was it built? What purpose did it serve? Where did its towering sandstone boulders come ...

Did adaptive radiations shape reptile evolution?

Some of the most fundamental questions in evolution remain unanswered, such as when and how extremely diverse groups of animals—for example reptiles—first evolved. For seventy-five years, adaptive radiations—the relatively ...

Evidence for volcanic craters on Saturn's moon Titan

Volcano-like features seen in polar regions of Saturn's moon Titan by NASA's Cassini spacecraft could be evidence of explosive eruptions that may continue today, according to a new paper by Planetary Science Institute Senior ...

Scientists identify ancient origin for key hormone system

A key set of proteins that help regulate hormones necessary for many essential functions in humans and other vertebrates have ancient origins in much simpler creatures such as sea cucumbers, says a new study published today ...

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