The sun emitted a significant solar flare that peaked at 1:14 a.m. EST on Nov. 10, 2013.

The Carolina hammerhead had long eluded discovery because it is outwardly indistinguishable from the common scalloped hammerhead.

Comets are icy and sometimes have tails. Asteroids are rocky or metallic and typically don't have tails. But this asteroid has six tails and rotates like a lawn sprinkler.

When a team of astronomers discovered two black holes in a collection of stars known as a globular cluster, they weren't sure if the black holes’ presence was a common occurrence or a unique stroke of luck.

A remarkable new species of tyrannosaur, Lythronax argestes - which translates as "king of gore" - has been discovered in Utah.

"Nobody has ever predicted that a single collapsing star could produce a pair of black holes that then merge." - Christian Reisswig

Mammal body size decreased significantly during at least two ancient global warming events. A new finding suggests a similar outcome is possible in response to human-caused climate change.

Satellite image showing shadow over Africa about 38 minutes after the maximum eclipse on November 3, 2013.

Two knee surgeons at University Hospitals Leuven have discovered a previously undescribed ligament in the human knee. The ligament appears to play an important role in patients with anterior cruciate ligament (ACL) tears.

"What this means is, when you look up at the thousands of stars in the night sky, the nearest sun-like star with an Earth-size planet in its habitable zone is probably only 12 light years away and can be seen with the naked eye." - Erik Petigura