The Earth is thought to be about 4.54 billion years old, at least according to the Planetary Society. And every hour, every minute, our ancient planet is evolving. But it's not all good news. For example, scientific evidence suggests that the Earth's vital magnetic field is weakening. Furthermore, crucial ocean currents are dangerously off-kilter. And are you aware that our planet is spinning faster, effectively making the days shorter? Yes, the world we call home is in a constant state of flux. So, how concerned should we be?
To find out what is happening and why, click through this gallery and ponder the future.