Which object has the same shape as a dna molecule?

Why did rutherford say that bombarding atoms with particles was like "playing with marbles" what

What form of anesthetic was used for field surgery

Homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?