Er, the Romans pretty much continued the science and engineering of the Greeks --the management of water alone was a massive engineering feat that wouldn't be matched for centuries. But mainly science and engineering was killed off by a cult that thought such things were against their beliefs and dogma. They were particularly successful in moving all literature and existing written studies to their cult offices or destroying them altogether. Eventually, the power of this cult waned a bit and science started flourishing again, a few centuries later.