I believe they can and do... as far as my religion is concerned ^^
I'm a science christian; I believe anything that happens and exists in this realm can be explained scientifically, including the works of God.
The only thing is, we just simply don't understand some things yet (:
A fine example; I believe that God created the big bang process. OK so what happened to God creating Earth in 7 days? Simple; that was someone's interpretation. No one is perfect except God, so obviously the Bible, written by humans, isn't perfect. In Genesis, Moses wrote it took seven days to create Earth. He was being shown what to write. God couldn't show Moses millions of years of evolution. So what did God do? He sped up time. He showed Moses a sped of version of Earth's creation that felt like 7 days to him. It appeared to Moses that Adam and Eve rose from the clay immediately when in reality it was a process.
Plus... could you imagine if the Bible read;
"And God created the Earth in 13 billion years"
Now the underlined part above about "in this realm";
I don't believe Heaven or the Spirit are physically calculable or can be contained, duplicated, etc.