Isn't it better to make the facts array a private field?

package com.example.android.funfacts;

import java.util.Random;

public class FactBook {
    private String[] facts = {
        "Ants stretch when they wake up in the morning.",
        "Ostriches can run faster than horses.",
        "Olympic gold medals are actually made mostly of silver.",
        "You are born with 300 bones; by the time you are an adult you will have 206.",
        "It takes about 8 minutes for light from the Sun to reach Earth.",
        "Some bamboo plants can grow almost a meter in just one day.",
        "The state of Florida is bigger than England.",
        "Some penguins can leap 2-3 meters out of the water.",
        "On average, it takes 66 days to form a new habit.",
        "Mammoths still walked the earth when the Great Pyramid was being built."
    };

    public String getFact() {
        Random random = new Random();
        int randomNumber = random.nextInt(facts.length);
        return facts[randomNumber];
    }
}