""Why should anyone believe that 'Biblical truth' is the only alternative to science?""

Precisely.

You would have a lot of trouble getting that one passed by a committee consisting of proportional numbers of the world's major religions, and atheists.

The whole of Christianity only accounts for a 33.32% and falling minority worldwide:-

Christian             33.32%       Falling
Muslim                21.01%       Rising
Hindu                13.26%       Stable
Buddhist               5.85%
Other religions       12.48%
No religion          14.09%

Sources were Wikipedia and the Toronto Religious Tolerance website.

Don T.