IT is well known that when positrons are annihilated, -rays with quantum energy of about 500 ekv. are emitted. This seems to prove that annihilation occurs with a loosely bound electron as a ...

This article takes an informal yet informative dive into the most endangered animals in each US state, highlighting the urgent need for conservation efforts ... Scenic view of Polar bear on ice, ...

Apr. 24, 2025 — Once thought resistant to invasion, California's deserts are losing native plants to aggressive weedy species like Saharan mustard. New research shows its spread is disrupting ...

Note: not all local offices coordinate training. Help protect native bird species. Avian awareness and avoidance training helps to avoid native birds getting killed and disturbed. It's also a ...