half a century

For almost half a century, scientists have struggled with plutonium nanoclusters spreading further in groundwater than expected, increasing the risk of sickness in humans and animals.

Scientists were able to finally discover and study the structure of plutonium nanoclusters.

For almost half a century, scientists have struggled with plutonium nanoclusters spreading further in groundwater than expected, increasing the risk of sickness in humans and animals.Scientists at the US Department of Energy's Argonne National Laboratory, in collaboration with researchers from the University of Notre Dame, were able to finally discover and study the structure of plutonium nanoclusters.

After half a century of debate, researchers have confirmed that dome-headed dinosaurs called pachycephalosaurs could collide with each other during courtship combat.

Some researchers have suggested that pachycephalosaur domes, which ranged from one to 20 centimetres thick, enabled head-butting contests as a way to attract mates, similar to the contests bighorn sheep engage in today.

Half a century after most of Costa Rica's rainforests were cut down, researchers from the Boyce Thompson Institute took on a project that many thought was impossible -- restoring a tropical rainforest ecosystem.

When the researchers planted worn-out cattle fields in Costa Rica with a sampling of local trees, native species began to move in and flourish, raising the hope that destroyed rainforests can one day be replaced.

After half a century of debate, a University of Alberta researcher has confirmed that dome-headed dinosaurs called pachycephalosaurs could collide with each other during courtship combat.