Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_22 (half_life VARCHAR, discovery_year VARCHAR)

### Question ###
What is the half-life discovered in 2003?

### Accurate SQL ###

SELECT half_life FROM table_name_22 WHERE discovery_year = "2003"