Posts by Dr. Allen F. Bortrum

A "city killer" sails by too close for comfort. Bortrum learns about his past from his father.

A Marsquake and a puff of methane detected. Boiling water on Earth.

Life and death on Everest. Denisovans were living high long long ago.

Hundreds of workers publish papers on tiny genes and on a monstrous black hole, "Seeing" the invisible.

Bortrum gets a mammogram. Russians add elements to the Periodic Table.

How Pittsburgh's Henry Heinz helped make our food safer and tastier. A 4-billion year old rock from Earth found on the Moon?

Fond memories of Pittsburgh. Thomas Starzl's legacy.

Exploring beyond Pluto. A new dwarf planet. A visit from an object older than Earth. A breakthrough of 2018.

Medical topics and astronomical findings such as galaxies and meteorite craters. Possible cause of partial global cooling?

Bell Labs researcher Arthur Ashkin, 96, wins Nobel Prize in Physics. Kepler's planet-hunting days are numbered. Asteroids the subject of past and current space missions.