Socks1000

Chosen answer: The Martians hadn't gotten that far yet.

Grumpy Scot

Answer: Robbie said that he only wanted to watch it happen, and not interact. He most likely ran off somehow and hid from the aliens before you saw the burning Humvee indicating the death of the military squadrons flying/driving in.

Chosen answer: Dumb luck? A soldier chased him off from the fighting? Who knows?

Grumpy Scot

Chosen answer: The aliens, who had no resistance to Earth's germs and microbes, were falling ill and dying, causing the tripods and the shields to fail.

raywest ★

Chosen answer: Ray couldn't trust Ogilvy to be quiet when the aliens arrived. So Ray had to kill Oglivy in order to save him and his daughter.

Chosen answer: It is never explained how or why they were underground or just how long they had been thre. However, they may have been buried too deep to have been detected.

raywest ★

Chosen answer: This has been answered before. The liquid, which is apparently a mixture containing human blood, is a defoliant that destroys Earth's foliage and replaces it with alien vegetation.

raywest ★

Answer: If you're referring to the liquid that pours out at the end when the alien piloting the tripod that was shot down dies, it may stand to reason that since the tripods themselves are built the same as the aliens (three legs and the same shaped head) it's a type of liquid that allows them to neurologically connect to the tripods and control it as though it's a dream. Sort of Pacific Rim-esque except no suit is needed.

General_Gigan

Answer: I believe that this orange liquid has nothing to do with the red weed or something like this. As this liquid is only visible when tripods are being attacked from inside or seriously damaged, this may hint that it is blood from the creatures or some kind of liquid flooding the whole habitable spaces inside the tripod, as the creatures look a little amphibious. Both theories fit the fact that in the last scenes, the liquid comes from the same door the alien puts his arm out.

Answer: For this film, the Martian tripods were already buried deep in the Earth's surface, lying dormant for thousands of years (or more) and only waiting for the actual Martians to arrive. When they did arrive, the Martians did not "teleport" into the tripods, but they were carried down in high-velocity capsules. Fairly early in the movie, a television news crew captures video footage of lightning striking the earth; upon replaying the footage in slow-motion, the TV crew can actually see these high-velocity capsules (containing the Martians) riding down the lightning stroke and into the ground. Therefore, the lightning probably served a dual purpose: It physically bored shafts into the ground directly to the tripods; it then served to guide the high-velocity capsules to the tripods.

Charles Austin Miller

Chosen answer: Impossible to answer, there's no indication onscreen as to how.

GalahadFairlight

Answer: I'm sure that's their teleportation beam.