While hiking near Big Bend Ranch State Park's Contrabando Trail, something Michael Alvard had never seen before caught his ...
1:D - The saguaro cactus, the largest cactus species in the world, can grow to more than 12 metres tall, and may have many thousands of spikes, especially if it has many arms., 2:B - Ivory is a hard, ...
A Texas hiker who stumbles on a once-in-a-lifetime rare cactus in the desert is not just finding a botanical curiosity, but ...