Ask Dr Karl: Why can't humans hibernate?

Read more about the science behind the video here: Not just sleep: all about hibernation

Latest videos

Why do flightless birds have wings?

1:12
Video: Why do flightless birds have wings?

Australia's longer bushfire season

2:00
Video: Australia's longer bushfire season

Bushfires: how can science prepare us?

3:00
Video: Bushfires: how can science prepare us?