Posts by Dr. Allen F. Bortrum

Birds and primates learn value of currency; weather extremes here on Earth and in Space

Megacryometeorites - hefty ice chunks out of the blue; superhail or shed from airliners?

Potpourri of Discover\'s top stories and other tidbits

Teeth provide clues to diet and to childhood

No column this week

Actual images of four planets orbiting distant stars captured by Hubble and Keck

Huge crystals in a Mexican cave

Obnoxious critters, revisiting life origin experiments, venting of a retiree, election musings

Are lithium-ion batteries really going to power your car?

Long-term commitments in voles and in mapping the universe