Alien Planet starts out with an interstellar spacecraft named Von Braun , leaving Earth's orbit . Traveling at 20 % the speed of light , it reaches Darwin IV in 42 years . Upon reaching orbit , it deploys the Darwin Reconnaissance Orbiter , Which looks for potential landing sites for the probes . The first probe , Balboa , explodes along with its lifting body transport during entry , because one of its wings failed to unfold . Two backup probes , Leonardo da Vinci and Isaac Newton , successfully land on the planet , and learn much about its bizarre indigenous lifeforms , including an apparently sapient species . The robotic probes sent out to research on Darwin IV are called Horus Probes . Each Horus probe consists of an { { convert } } long inflatable , hydrogen-filled balloon , Which is covered with solar receptors , a computer ' brain ' , a ' head ' covered with sensors , and several smaller robots that can be sent to places too dangerous for the probes themselves . The probes have a limited degree of artificial intelligence , very similar to the ' processing power ' of a 4-year-old . All the real thinking is done by a supercomputer in the orbiting Von Braun . The probes are programmed with different personalities ; Ike is more cautious , while Leo is the risk-taker . The two probes are also equipped with a holographic message that will be projected to any sentient life found on Darwin . After the two probes inflate their gas-bags , they encounter a voracious Arrowtongue and watch it pursue a Gyrosprinter .

Question: "Despite the probes' limited A.I., what handles the "real thinking"?"

Answer: "An ape"

Response: no

Sound waves are mechanical waves. They can travel only through matter. They cannot travel through empty space. This was demonstrated in the 1600s by a scientist named Robert Boyle. Boyle placed a ticking clock in a sealed glass jar. The clock could be heard ticking through the air and glass of the jar. Then Boyle pumped the air out of the jar. The clock was still running, but the ticking could not be heard. Thats because the sound couldnt travel without air particles to transfer the sound energy. Is there any other place where sound cannot be heard? Here is a hint: is there any other place that does not have air molecules? Thats right, in space sound cannot be transferred. So can astronauts hear each other? Yes, they can, because they are in enclosed space stations or pressurized suits.In both cases, they are surrounded by air molecules. If they left their space ship and did not use their electronics, they would not be able to hear each other. Next time you watch a science fiction movie, think about this factoid. When spaceships are destroyed by hostile alien beings, there would be no sound heard. Sound waves can travel through many kinds of matter.

Question: "How do sound waves travel?"

Answer: "Through matter"

Response: yes

How would the universe look without gravity? It would have no planets and no stars. Thats how it looked when it was young. When the universe was young, there was only gas and dust. From this gas and dust, everything we now see was made. How were stars and planets created from just gas and dust? The answer is gravity. The same gravity that holds you down on Earth. The same force that causes your pencil to roll off your desk. The same force that causes it to fall to the floor. The invisible force of gravity caused dust and gas particles to be pulled together. This force is what formed all the objects in our solar system. This force formed the smallest moons. It also formed our Sun. This force caused more than just our solar system to form. It caused all the other solar systems to form. It caused the formation of all the galaxies of the universe.

Question: "Gravity pulled dust and gas particles together to form?"

Answer: "Planets and stars"

Response: yes

In March 2001, Rice asked the CIA to prepare a new series of authorities for covert action in Afghanistan. Rice's recollection was that the idea had come from Clarke and the NSC senior director for intelligence, Mary McCarthy, and had been linked to the proposal for aid to the Northern Alliance and the Uzbeks. Rice described the draft document as providing for "consolidation plus," superseding the various Clinton administration documents. In fact, the CIA drafted two documents. One was a finding that did concern aid to opponents of the Taliban regime; the other was a draft Memorandum of Notification, which included more open-ended language authorizing possible lethal action in a variety of situations. Tenet delivered both to Hadley on March 28. The CIA's notes for Tenet advised him that "in response to the NSC request for drafts that will help the policymakers review their options, each of the documents has been crafted to provide the Agency with the broadest possible discretion permissible under the law." At the meeting, Tenet argued for deciding on a policy before deciding on the legal authorities to implement it. Hadley accepted this argument, and the draft MON was put on hold. As the policy review moved forward, the planned covert action program for Afghanistan was included in the draft presidential directive, as part of an "Annex A" on intelligence activities to "eliminate the al Qaeda threat." The main debate during the summer of 2001 concentrated on the one new mechanism for a lethal attack on Bin Laden-an armed version of the Predator drone. In the first months of the new administration, questions concerning the Predator became more and more a central focus of dispute. Clarke favored resuming Predator flights over Afghanistan as soon as weather permitted, hoping that they still might provide the elusive "actionable intelligence" to target Bin Laden with cruise missiles. Learning that the Air Force was thinking of equipping Predators with warheads, Clarke became even more enthusiastic about redeployment. The CTC chief, Cofer Black, argued against deploying the Predator for reconnaissance purposes. He recalled that theTaliban had spotted a Predator in the fall of 2000 and scrambled their MiG fighters. Black wanted to wait until the armed version was ready. "I do not believe the possible recon value outweighs the risk of possible program termination when the stakes are raised by the Taliban parading a charred Predator in front of CNN," he wrote.

Question: "Who did Rice recall had the idea of asking the CIA to prepare a new series of authorities for covert action in Afghanistan?"

Answer: "Cofer Black"

Response:
no