Global environmental challenges
This disc on a look-out point by a British Antarctic research station shows places more than 200 km (125 miles) away — and on a clear day you can see them.
The air in Antarctica is so clear, dry, cold and dust- and pollution-free that you can see mind-boggling distances.
Jenny Island on the disc — part of a memorial for Kirsty Brown, a diver who died in a leopard seal attack in 2003 — is 21 km away and is in the centre-right on the picture below:
Cape Brown Alexander, just to the left of Jenny Island, is 203 km distant. You can’t see it with the resolution of the photo on the right and it’s hard to tell sometimes if that lump in the distance is an iceberg or land.