At age 75, Vadevino Alano keeps up a brisk pace as he strides through the forest on the way to the Armadillo’s Den — a spectacular cave in southern Brazil. When he reaches the cave’s opening ...

It is wonderful to be here in Thabazimbi, in the incredibly beautiful Waterberg District of Limpopo. I love it here. I just wish I could come more often and stay longer. This is truly a spectacular ...