On CNN Tuesday morning, Jeb Bush Jr. -- the son of former Florida governor Jeb Bush -- said Sen. Marco Rubio (R-Fla.) gave "kind of a head-scratching type of answer" to a recent question about the age of the Earth.

Rubio told GQ Magazine that he couldn't say how old he thinks the planet is. “I’m not a scientist, man,” he said. "I don't think I'm qualified to answer a question like that. ... Whether the Earth was created in seven days, or seven actual eras, I'm not sure we'll ever be able to answer that. It's one of the great mysteries."

Asked about the comment, Bush called it a "strange question" but also "kind of a strange response." He suggested Rubio's support for science did not come through in the interview.

“We've got to be a kind of pro-science and pro-technology party. And I think Marco Rubio is just that," Bush said. "On the Earth question, I guess I have to read more closely in terms of getting a better understanding, but, yeah, kind of a strange response, I guess.”

Bush also said he's hoping his father will run for president in 2016. 

"I don't know, no comment, I certainly hope so," he said when asked about his dad's plans. The younger Bush chairs a political action committee, SunPAC, aimed at young Florida Hispanic voters.