If the terms programmable, firewall and edits make you think of computers, then this is not a surprise, but the connection to tiny living cells may be unexpected. Within the last few years, scientists have discovered that some tiny microbes display a system which eliminates potential hostile invasions into the cell.
Computer virus attacks come in the form of strings of computer code which will have a negative effect on any computer that they invade. A firewall is a computer program used to identify and eliminate incoming computer viruses. Within the last few years, scientists have discovered that some tiny microbes (very tiny cells which lack a defined nucleus but still have DNA) also have a system which eliminates potential hostile invasions into the cell. These tiny bacteria (like E. coli in your digestive system) are able to identify and destroy incoming hostile DNA (from real viruses).
The bacterial firewall works like this. Programmed into the DNA of the bacterium is a short unusual order of nucleotides called a CRISPR sequence. Attached to this is a short piece of DNA which was snipped out of a previous invader and attached to the CRISPR. The CRISPR and attached short hostile specimen are duplicated into RNA. Together this combination roams the cell looking for entire strings of DNA which include the specimen snippet. When they find one, they attach to the foreign DNA. In response, along come some specialized proteins (the big guns!!) which chop up the foreign DNA. There can be many different CRISPR-foreign snippet combinations in the cell looking for hostile invaders.
Scientists have discovered that they can program other snippets of DNA (of the scientists’ choice) into a CRISPR system. They can now precisely cut DNA at any location they desire. Also, they can tamper with the associated proteins to produce all sorts of fancy effects never before possible. See for example germ line changes and gene drive mutations.
The CRISPR system is clear evidence that life is designed: