In Simon's latest Mindful Frog Audio Adventure, you'll be visiting the most famous rain forest in the world.
We're in Brazil, and right on the Earth's equator where it's always warm.
You'll find out why Sloths make their way down to the forest floor once a week, and what they love to eat more than anything in the world.
Simon's latest audio adventure takes him to Mars, where you get to meet the incredible Mars rover Curiosity.
This hard working robot has been sending back invaluable scientific data and photos since 2012.
NASA only expected it to last two years maximum in the harsh Mars environment, but as of January 2018, it's still going strong.
Not a bad effort on a planet famous for having no atmosphere to speak of, huge amounts of radiation, plenty of serious dust storms and mostly freezing conditions.